How many calories is this?

Okay: vitamins (15), gum (15), burrito (280), half an airhead (30), all through the day, which is 340, trust me, i looked at the nutrition facts. what i'm wondering is, in one and a half 2" square Ghirardeli Triple Chocolate brownies, how many calories are there? i try eating 780 a day, and I really need to know how many calories there are. thanks! ten points to first correct-sounding asnwer! :)