10. A Day at the Supermarket / Stocking Out

shopping_list = ["banana", "orange", "apple"]
 
stock = {
    "banana": 6,
    "apple": 0,
    "orange": 32,
    "pear": 15
}
    
prices = {
    "banana": 4,
    "apple": 2,
    "orange": 1.5,
    "pear": 3
}
 
def compute_bill(food):
    total = 0
    for n in food:
        if stock[n] >0 :
            total += prices[n]
            stock[n] -=1
    return total