How do you report hours that vary week to week? - any advice?

I work some days through a staffing agency while still certifying. I have read a lot of threads here and could not find my exact situation. The form asks for gross earnings, which I do not see until later. Did anyone get an overpayment notice from a mistake?

The claimant handbook has worked examples for part-time pay. Mine was clearer than the phone line.

Thanks for writing this out. I went through something close to it last year, and it settled down once I kept a simple log of every call and form.