How do you report hours that vary week to week? (Tampa)

My hours change every week at my new part-time job and I am afraid of reporting wrongly. There are 10 people counting on me, so I am trying to be careful. Sometimes my paycheck is late by a week. Who can I ask without risking my claim?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.

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