Two Dictionaries and a Sum!

[Bradley Wright]

Confusing subject for a confusing problem (to a novice like me of course!)
Thx for the help in advance folks

I have (2) dictionaries:

prices = {
    "banana": 4,
    "apple": 2,
    "orange": 1.5,
    "pear": 3
}
    
stock = {
    "banana": 6,
    "apple": 0,
    "orange": 32,
    "pear": 15
}

Here's my instructions:

consider this as an inventory and calculate the sum (thats 4*6 = 24 bananas!)

HERES MY CODE:

for key in prices:
    print prices[key]*stock[key]

HERES THE OUTPUT:

48.0
45
24
0

ISSUE:
I need to find a way to add all of those together...any pointers?