I am trying to track the total hours worked for an external vendor. We are paying for their service for a certain number of hours and each week I want to subtract the hours worked for that week from the allotted hours. I want a cell that gives me the total and subtracts out hours worked. I cannot, for the life of me, figure out how to do this. Can someone help me figure out a formula for this?
As an example:
600 (Hours we have to work with)
50 (worked week 1)
40 (worked week 2)
Total hours available: 510