diff --git a/lib/far_mar.rb b/lib/far_mar.rb
index 24119757..cb1d418e 100644
--- a/lib/far_mar.rb
+++ b/lib/far_mar.rb
@@ -1,6 +1,6 @@
 require 'csv'
 require 'time'
 require './lib/far_mar/market'
-require './lib/far_mar/vendor'
+require_relative('far_mar/vendor.rb')
 require './lib/far_mar/sale'
 require './lib/far_mar/product'
diff --git a/lib/far_mar/market.rb b/lib/far_mar/market.rb
index 638ff607..a90c0054 100644
--- a/lib/far_mar/market.rb
+++ b/lib/far_mar/market.rb
@@ -1,5 +1,51 @@
+require "csv"
+
 module FarMar
   class Market
-    
+
+    attr_accessor :id, :name, :address, :city, :county, :state, :zip
+
+    def initialize(id, name, address, city, county, state, zip)
+      @id = id.to_i
+      @name = name
+      @address = address
+      @city = city
+      @county = county
+      @state = state
+      @zip = zip
+    end
+
+    # Returns an array of Market instances representing all of the markets
+    # Not sure I fully understand how this method works.
+    def self.all
+      csv_info = CSV.read("./support/markets.csv")
+      markets = []
+      csv_info.each do |line|
+        markets.push(Market.new(line[0], line[1], line[2], line[3], line[4], line[5], line[6]))
+      end
+      return markets
+    end
+
+    # Returns an instance of Market where the value of the id in the csv
+    # matches the passed parameter.
+    def self.find(market_id)
+      all.each do |market|
+        if market.id == market_id
+          return market # the instance of the market.
+        end
+      end
+    end
+
+    # Given the ID of the market, RETURN vendors with the same market_id.
+    def vendors
+      vendor_array = []
+      FarMar::Vendor.all.find_all do |v|
+        if v.market_id == id
+          vendor_array.push(v)
+        end
+      end
+      return vendor_array
+    end
+
   end
 end
diff --git a/lib/far_mar/product.rb b/lib/far_mar/product.rb
index 8efc48d2..e4298cbe 100644
--- a/lib/far_mar/product.rb
+++ b/lib/far_mar/product.rb
@@ -1,5 +1,76 @@
+require "csv"
+
 module FarMar
   class Product
 
+    attr_accessor :id, :name, :vendor_id
+
+    def initialize(id, name, vendor_id)
+      @id = id.to_i
+      @name = name
+      @vendor_id = vendor_id.to_i
+    end
+
+    # Returns a collection of product instances
+    # representing all of the products described in the CSV
+    def self.all
+      csv_info = CSV.read("./support/products.csv")
+      products = []
+      csv_info.each do |line|
+        products.push(Product.new(line[0], line[1], line[2]))
+      end
+      return products
+    end
+
+    # Returns an instance of product where the value of the id in the csv
+    # matches the passed parameter.
+    def self.find(product_id)
+      all.each do |product|
+        if product.id == product_id
+          return product # the instance of the vendor.
+        end
+      end
+    end
+
+    # Returns the instance of the Vendor by the product vendor_id.
+    def vendor
+      FarMar::Vendor.all.each do |vend|
+        if vend.id == vendor_id
+          return vend
+        end
+      end
+    end
+
+    # Returns array of sales where the product_id equals the Product ID
+    def sales
+      sales_array = []
+      FarMar::Sale.all.find_all do |sales|
+        if sales.product_id == id
+          sales_array.push(sales)
+        end
+      end
+    end
+
+    # Returns the number of times this product has been sold.
+    def number_of_sales
+      count = 0
+      FarMar::Sale.all.each do |s|
+        if s.product_id == id
+            count += 1
+        end
+      end
+      return count
+    end
+
+    # Returns all of the products matching the vendor_id
+    def self.by_vendor(vend_id)
+      product_array = []
+      self.all.find_all do |prod|
+        if prod.vendor_id == vend_id
+          product_array.push(prod)
+        end
+      end
+      return product_array
+    end
   end
 end
diff --git a/lib/far_mar/sale.rb b/lib/far_mar/sale.rb
index d68f9ded..98d6ea55 100644
--- a/lib/far_mar/sale.rb
+++ b/lib/far_mar/sale.rb
@@ -1,5 +1,69 @@
+require "csv"
+
 module FarMar
   class Sale
 
+    attr_accessor :id, :amount, :purchase_time, :vendor_id, :product_id
+
+    def initialize(id, amount, purchase_time, vendor_id, product_id)
+      @id = id.to_i
+      @amount = amount.to_i
+      @purchase_time = DateTime.strptime(purchase_time, "%Y-%m-%d %H:%M:%S %z")
+      @vendor_id = vendor_id.to_i
+      @product_id = product_id.to_i
+    end
+
+    # Returns a collection of sale instances
+    # representing all of the sales described in the CSV
+    def self.all
+      csv_info = CSV.read("./support/sales.csv")
+      sales = []
+      csv_info.each do |line|
+        sales.push(Sale.new(line[0], line[1], line[2], line[3], line[4]))
+      end
+      return sales
+      ## for optimization, say, if @sales has stuff in it, don't run it again, just return it.
+    end
+
+    # Returns an instance of sale where the value of the id in Sale
+    # matches the passed parameter.
+    def self.find(sale_id)
+      all.each do |sales|
+        if sales.id == sale_id
+          return sales # the instance of the sale.
+        end
+      end
+    end
+
+    # Returns the instance of the vendor associated with the Sale vendor_id
+    def vendor
+      FarMar::Vendor.all.each do |v|
+        if v.id == vendor_id
+          return v
+        end
+      end
+    end
+
+    # Returns the one product ID associated with this sale using the product_id
+    def product
+      FarMar::Product.all.each do |prod|
+        if prod.id == product_id
+          return prod
+        end
+      end
+    end
+
+    # Returns an array of sale objects where the purchase time is between the
+    # two times given as arguments.
+    def self.between(beginning_time, end_time)
+      sales_array = []
+      self.all.find_all do |sales|
+        if sales.purchase_time >= beginning_time && sales.purchase_time <= end_time
+          sales_array.push(sales)
+        end
+      end
+      return sales_array
+    end
+
   end
 end
diff --git a/lib/far_mar/vendor.rb b/lib/far_mar/vendor.rb
index bfe19c33..9e45ac25 100644
--- a/lib/far_mar/vendor.rb
+++ b/lib/far_mar/vendor.rb
@@ -1,5 +1,92 @@
+require "csv"
+
 module FarMar
   class Vendor
 
+    attr_accessor :id, :name, :employees, :market_id, :vendors
+
+    def initialize(id, name, employees, market_id)
+      @id = id.to_i
+      @name = name
+      @employees = employees.to_i
+      @market_id = market_id.to_i
+    end
+
+    # Returns an array of Vendor instances
+    # representing all of the vendors in the CSV
+    def self.all
+      csv_info = CSV.read("./support/vendors.csv")
+      vendors = []
+      csv_info.each do |line|
+        vendors.push(Vendor.new(line[0], line[1], line[2], line[3]))
+      end
+      return vendors
+    end
+
+    # Returns an instance of Vendor where the value of the id
+    # matches the passed parameter.
+    def self.find(vendor_id)
+      all.each do |vendor|
+        if vendor.id == vendor_id
+          return vendor # the instance of the vendor.
+        end
+      end
+    end
+
+    # Checking the market_id (of the vendor), what market do I belong to?
+    def market
+      FarMar::Market.all.each do |market|
+        if market.id == market_id
+          return market
+        end
+      end
+    end
+
+    # Returns an array of products with a vendor_id that matches the Vendor id
+    def products
+      product_array = []
+      FarMar::Product.all.find_all do |product|
+        if product.vendor_id == id
+          product_array.push(product)
+        end
+      end
+      return product_array
+    end
+
+    # Returns array of sales with vendor_id that match the vendor's ID
+    def sales
+      sales_array = []
+      FarMar::Sale.all.find_all do |sale|
+        if sale.vendor_id == id
+          sales_array.push(sale)
+        end
+      end
+      return sales_array
+    end
+
+    # Add all sales for vendor. Return sum in cents.
+    # If the vendor_id in Sale matches the Vendor ID, add them. Start a count.
+    def revenue
+      sale_cents = 0
+      FarMar::Sale.all.each do |sale|
+        if sale.vendor_id == id
+          sale_cents += sale.amount
+        end
+      end
+      return sale_cents
+    end
+
+    # Returns all of the vendors with the given market_id.
+    # (check the Vendors and if market_id matches market_id, array them.)
+    def self.by_market(market_id)
+      vendor_by_market_array = []
+      all.each do |vendors|
+        if vendors.market_id == market_id
+          vendor_by_market_array.push(vendors)
+        end
+      end
+      return vendor_by_market_array
+    end
+    
   end
 end
diff --git a/spec/far_mar/market_spec.rb b/spec/far_mar/market_spec.rb
index 3d9cf287..d42a0503 100644
--- a/spec/far_mar/market_spec.rb
+++ b/spec/far_mar/market_spec.rb
@@ -2,7 +2,7 @@
 
 describe FarMar::Market do
   before :each do
-    @market = FarMar::Market.new
+    @market = FarMar::Market.new(1, 2, 3, 4, 5, 6, 7)
   end
 
   describe "Market.new" do
@@ -10,4 +10,30 @@
       expect(@market).to be_an_instance_of FarMar::Market
     end
   end
+
+  describe ".all" do
+    it "returns an array" do
+      expect(FarMar::Market.all).to be_an Array
+    end
+  end
+
+  describe ".find" do
+    it "returns a single market" do
+      expect(FarMar::Market.find(1)).to be_an_instance_of FarMar::Market
+      expect(FarMar::Market.find(14).id).to eq 14
+    end
+  end
+
+  describe "#vendors" do
+    before :each do
+      @vendors = FarMar::Vendor.new(1,2,3,4)
+    end
+    it "returns an array of vendors" do
+      expect(@market.vendors).to be_an Array
+    end
+
+    it "has elements in the array" do
+      expect(@market.vendors.length).to eq 6
+    end
+  end
 end
diff --git a/spec/far_mar/product_spec.rb b/spec/far_mar/product_spec.rb
index 5f4a040b..b11e730b 100644
--- a/spec/far_mar/product_spec.rb
+++ b/spec/far_mar/product_spec.rb
@@ -2,7 +2,7 @@
 
 describe FarMar::Product do
   before :each do
-    @product = FarMar::Product.new
+    @product = FarMar::Product.new(1,2,3)
   end
 
   describe "Product.new" do
@@ -10,4 +10,45 @@
       expect(@product).to be_an_instance_of FarMar::Product
     end
   end
+
+  describe ".all" do
+    it "returns an array" do
+      expect(FarMar::Product.all).to be_an Array
+    end
+  end
+
+  describe ".find" do
+    it "returns a single vendor" do
+      expect(FarMar::Product.find(2)).to be_an_instance_of FarMar::Product
+      expect(FarMar::Product.find(2).id).to eq 2
+    end
+  end
+
+  describe "#vendor" do
+    it "returns a single vendor" do
+      expect(@product.vendor).to be_an_instance_of FarMar::Vendor
+    end
+  end
+
+  describe "#sales" do
+    it "returns an array of sales" do
+      expect(@product.sales).to be_an Array
+    end
+  end
+
+  describe "#number_of_sales" do
+    it "returns number of times the product has been sold" do
+      expect(@product.number_of_sales).to be >= 0
+    end
+  end
+
+  describe ".by_vendor" do
+    it "returns an array" do
+      expect(FarMar::Product.by_vendor(1)).to be_an Array
+    end
+    it "returns a certain number of instances" do
+      expect(FarMar::Product.by_vendor(5).length).to eq 3
+    end
+  end
+  
 end
diff --git a/spec/far_mar/sale_spec.rb b/spec/far_mar/sale_spec.rb
index 97435fad..93cc529d 100644
--- a/spec/far_mar/sale_spec.rb
+++ b/spec/far_mar/sale_spec.rb
@@ -2,7 +2,7 @@
 
 describe FarMar::Sale do
   before :each do
-    @sale = FarMar::Sale.new
+    @sale = FarMar::Sale.new(19,9035,"2013-11-11 03:37:15 -0800",4,6)
   end
 
   describe "Sale.new" do
@@ -10,4 +10,36 @@
       expect(@sale).to be_an_instance_of FarMar::Sale
     end
   end
+
+  describe ".all" do
+    it "returns an array" do
+      expect(FarMar::Sale.all).to be_an Array
+    end
+  end
+
+  describe ".find" do
+    it "returns a single sale" do
+      expect(FarMar::Sale.find(2)).to be_an_instance_of FarMar::Sale
+      expect(FarMar::Sale.find(2).id).to eq 2
+    end
+  end
+
+  describe "#vendor" do
+    it "returns a specific vendor" do
+      expect(@sale.vendor).to be_an_instance_of FarMar::Vendor
+    end
+  end
+
+  describe "#product" do
+    it "returns a specific product" do
+      expect(@sale.product).to be_an_instance_of FarMar::Product
+    end
+  end
+
+  describe ".between" do
+    it "returns an array of sales" do
+      expect(FarMar::Sale.between(1,2)).to be_an Array
+    end
+  end
+
 end
diff --git a/spec/far_mar/vendor_spec.rb b/spec/far_mar/vendor_spec.rb
index 1f584e68..7cc1ffc0 100644
--- a/spec/far_mar/vendor_spec.rb
+++ b/spec/far_mar/vendor_spec.rb
@@ -2,7 +2,7 @@
 
 describe FarMar::Vendor do
   before :each do
-    @vendor = FarMar::Vendor.new
+    @vendor = FarMar::Vendor.new(1, 2, 3, 1)
   end
 
   describe "Vendor.new" do
@@ -10,4 +10,54 @@
       expect(@vendor).to be_an_instance_of FarMar::Vendor
     end
   end
+
+  describe ".all" do
+    it "returns an array" do
+      expect(FarMar::Vendor.all).to be_an Array
+    end
+  end
+
+  describe ".find" do
+    it "returns a single vendor" do
+      expect(FarMar::Vendor.find(2)).to be_an_instance_of FarMar::Vendor
+      expect(FarMar::Vendor.find(2).id).to eq 2
+    end
+  end
+
+  describe "#market" do
+    it "returns a specific market" do
+      expect(@vendor.market).to be_an_instance_of FarMar::Market
+    end
+  end
+
+  describe "#products" do
+    it "returns an array of products" do
+      expect(@vendor.products).to be_an Array
+    end
+  end
+
+  describe "#sales" do
+    it "returns an array of sales" do
+      expect(@vendor.sales).to be_an Array
+    end
+  end
+
+  describe "#revenue" do
+    it "returns a number of cents" do
+      expect(@vendor.revenue).to be > 0
+    end
+  end
+
+  describe ".by_market" do
+    it "returns an array of vendors" do
+      expect(FarMar::Vendor.by_market(1)).to be_an Array
+      expect(FarMar::Vendor.by_market(1).length).to eq 6
+    end
+
+    # it "returns the right number of things" do
+    #   FarMar::Vendor.by_market(1).each do |s|
+    #     expect()
+    #   end
+    # end
+  end
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 47ba5329..da54716a 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,3 +1,8 @@
 require 'simplecov'
 SimpleCov.start
 require "./lib/far_mar"
+
+RSpec.configure do |config|
+  config.order = 'random'
+end
+