I have convinced my uncle to accept Bitcoin Cash in his restaurants. How do I set him up.

I have seen and am aware of the merchant wallet but I have a few questions if someone here can answer it.

1. Does it have an option where the bitcoin cash can go straight to an exchange, convert to usd and show up in his bank account. And if thats and option is there a way to perhaps turn it off and just transfer and hold it in his BCH wallet because depending on times he would either like to quickly convert or hold.

2. How will it print receipt.

3. How to give refunds using the merchant wallet.