shopping_list = ["banana", "orange", "apple", "pear", "soda"]

QTY_purchased = {
    "banana": 1,
    "orange": 1,
    "apple": 2,
    "pear": 1,
    "soda": 12
}
prices = {
    "banana": 4,
    "orange": 2,
    "apple": 1.5,
    "pear": 3,
    "soda": 1
}
UPC = {
    "banana": 1,
    "orange": 2,
    "apple": 3,
    "pear": 4,
    "soda": 5
}
item_description = {
    "banana": 1,
    "orange": 2,
    "apple": 3,
    "pear": 4,
    "soda": 5
}
tax = {
    "banana": 0,
    "orange": 0,
    "apple": 0,
    "pear": 0,
    "soda": 1
}

def compute_bill():
    for x in shopping_list:
        pretax=prices * QTY_purchased
        print(pretax)
    return pretax

compute_bill()