What is the right payment to give a friend who babysits for you?

Jay-Jay & Flynny 29/07/2020

Flynny's wife Nat is out of town with one of the kids at a swim meet this weekend, and Flynny's got a DJ gig Saturday night. So Flynny has roped in Control Room George to watch over the three kids for him.

But if you've got your mate to babysit for you, what's the best way to repay them?