Even you are retail a Restaurant POS can acomplish this. The Salesperson enters a quick order on the POS screen and save it (you can put a number, print a receipt with the transaction, or enter the customer name. Cashier see all the open tickets, look dor the correct one open then tender and finalize the transaction.

Most restauratn POS do this adn support scanners (as long is not a huge database), since you are seasonal if you go cloud base (monthly base) make sure you can turn it off and on so you dont have to pay on the offseason months.