I want to create a budget spreadsheet to keep track of how much we are
spending in various categories. I'll enter all of our expenses for the
month. Then I want to be able to add up those catergoies individually.
Example. Assume my spreadsheet has two columns as follows:

A B
1 Home $100
2 Gas $32
3 Food $18
4 Home $29
5 Home $44
6 Gas $31
7 Food $13

What formula do I need to total all Home expenses, food expenses, etc?