How do you report hours that vary week to week? - 9 months and counting

I picked up part-time shifts as a retail manager and I am confused about how to report them. It has been a long 17 weeks. Sometimes my paycheck is late by a week.

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

I estimated and then checked my pay stub. When there was a small difference I wrote to the agency to correct it.