# Making a Purchashe

#1

Please guys help me solve this. I tried every i can think of and i always get errors.

Oops, try again. compute_bill(['apple']) resulted in a NameError: global name 'key' is not defined

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 cumpute_bill(food):
total = 0
for item in food:
item = prices[key]
total += item

#2

here:

item = prices[key]

key is undefined, you want to get the price of item (which contains items from food list)

#3

I did this:
def compute_bill(food):
total = 0
for item in food:
total += prices[item]
but still not working.

#4

better, nearly there

a function ends the moment a return keyword is reached

so your function ends in the first iteration/run of your loop, to get to the correct total the whole loop needs to run

#5

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