Let me describe what we're doing:
We are an agency that has several creative agents working on projects for our clients. Each creative logs hours worked on projects.
We need to be able to count the total hours worked by all agents, then report that to the client report in one cell.
Does that make sense? So if we have 5 agents working on projects for an individual client, each tracking their hours worked on their own sheet, I need to total all the hours worked for that client and show that number on the client's report.