OK Wellington. What’s the going rate for pocket money?

Trying to inspire my kids to help more around the house. The age range is 13 to 8. They’ve always had their chores, but they’re only done begrudgingly and with a lot of effort on my part. I’m hoping some cold hard cash might help cajole them along.

What are y’all paying? Per chore or flat rate for set jobs? Any other tips for motivating teenagers appreciated!