# Stocking Out - seems checking for stock[item] > 0 is insufficient

#1

Hello all! I'm stuck on 12 - Stocking Out. It says to only check that the stock[item] is greater than zero, but the code is failing and I believe it's because I'm computing a total for 8 bananas, but I only have 6 in stock. Not sure how to resolve it. Thanks for any help!

Oops, try again. calling compute_bill with a list containing 1 apple, 2 pears, 1 orange and 8 bananas resulted in 39.5 instead of the correct 31.5

Here is my code...

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

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 item in food:
if stock[item] > 0:
total += prices[item]
stock[item] - 1
else:
total += 0

#2

this line:

stock[item] - 1

doesn't reduce your stock, you do it right here:

total += prices[item]

which is a shorthand for:

total = total + prices[item]

but then when you have to reduce the stock, you don't update the variable

#3