Trying to Sum the Following Table:

Run Date Credit Amount
10/13/04 TRUE $150
11/10/04 FALSE $100
10/13/04 TRUE $100
10/13/04 FALSE $100
12/15/04 TRUE $150


WHAT IS THE SUM OF RUN DATE 10/13/04 WHERE THE CREDIT IS TRUE?

WHAT SUM PRODUCT FORMULA TO USE TO GET THE RESULT OF $250?