Apply Discount to Prices.py

class Solution:
    def discountPrices(self, sentence: str, discount: int) -> str:
        s = sentence.split() # convert to List to easily update
        m = discount / 100 
        for i,word in enumerate(s):
            if word[0] == "$" and word[1:].isdigit(): # Check whether it is in correct format
                num = int(word[1:]) * (1-m) # discounted price
                w = "$" + "{:.2f}".format(num) #correctly format
                s[i] = w #Change inside the list
        
        return " ".join(s) #Combine the updated list
		```