[Ghoulish Delight]

I'm using Excel a lot at work. All of our test results are being put into some huge, complex matrices. I've got some questions on how to get some things done, plus I just accidentally found a nifty feature.

First, the nifty feature. If you're in a column that's got some data, and some blank spaces in between the data, holding ctrl and pressing the up or down arrow will bring you to the next cell in that column that has data in it. Great for fast scrolling to your data points. I presume it works for left and right in rows as well.

Now, for my quesiton. Let's say you have two columns. Column A will be either blank or say "yes" for each row. Column B has numerical data for each row. Here's what I want to accomplish. For each row, if Column A="yes", add the data in column B to a total. I can write it in code, but I can't wrap my brain around doing it in excel without a long formula like this: IF(A0="yes", B0,0)+IF(A1="yes", B1,0)+IF(A2="yes",B2,0)+...etc on down the rows. There's got to be a better solution.