prices = {
    "banana" : 4,
    "apple"  : 2,
    "orange" : 1.5,
    "pear"   : 3
}

stock = {
    "banana" : 6,
    "apple"  : 0,
    "orange" : 32,
    "pear"   : 15,
}


total = 0

for key in prices:
    print key
    print "price: %s" % prices[key]
    print "stock: %s" % stock[key]
    print prices[key] * stock[key]
    total += prices[key] * stock[key]


print total
Add total calculation script