Convert a list of integers to strings?

[Cornelis]

Is there any way to convert a list of integers to a list of strings?
Below is a program that asks the user how much he paid for the food and the program calculates the returned change.

I want the output to be for example [500 note, 200 note, 10 coin, 1 coin]. The notes and coins are in SWE if it seems unfamiliar ;)

 
price = int(input('What is the price for the food? '))
paid = int(input('How much did you pay for it? '))
change = paid - price
cash = [500, 200, 100, 50, 20, 10, 5, 2, 1]
changeReturned = []
for i in cash:
    while change >= i:
        changeReturned.append(i)
        change = change - i
print(changeReturned)