I understand your point and do respect your timelines but that's exactly what my point it, when you said:
"Also, allowing delivery guys to handle so much cash is much risky and troublesome in management than convincing store owner to get the payout afterwards."
It's a double hard-time because you worked so hard for store to agree with daily payout yet we are still worrying for delivery guys that are handling so much cash - it;s because they didnt pay the store so the money paid by customers is in their hands. 🙁
With the I proposed, this is something the store won't hesitate to join and for operator not to get confused when managing, and for the delivery guy who will easily figure out how much to remit. - and they have less money on their hand - less risk.