Dragging a function across columns, one constant

Hey everyone! I've been searching online for a while and I just can't seem to find the correct answer.

For work, I'm trying to figure out how to drag the SUMIF function across 4-6 columns. I am trying to total the number of people who do a search online using specific key terms.

I have selected the terms I want to evaluate by putting a column next to the name (column A) and placing a "1" in the appropriate row/column if that source was used. There is then a corresponding number of searches for each key term.

Basically, I want to be able to keep the "1's" in Column B a constant but be able to change whether I'm pulling the numbers from Column C, D, E, F and so on (which could be considered months).

I have a "Total" row for the findings of the functions.

I may have confused a lot of you, and I'm sorry. This is just really frustrating me and I'm tired of filling out the SUMIF function over and over again. Help!!??

I attempted to create a small sample spreadsheet, similar to what I'm working with.

Hi,

Why not posting your worksheet ... it would be more explicit than a picture ...