I am trying to use the SUMIF function with two variables.
What I have is a worksheet with multiple columns. Let's say columns A and B
have data (names) and column C has numbers. What I want to do is check for
criteria in columns A and B and add column C if they match.

Job Skill Type Hours
abc wri 3
xyz wri 2
abc ill 3
xyz wri 5
abc wri 3

On a seperate worksheet in the same workbook I want it to determine the
total hours that "abc" worked "wri" only.
I have tried to imbed an AND function as part of the SUMIF function but
can't get it to work.