the usual way to deal with overproduction is either producing less or lowering the prices. not exactly rocket science. another smart way to do it is giving a discount on everything left the last hour the store is open. if you're afraid that makes potential earlier customer just come late instead (most don't, there's precedent) then make it half an hour instead. still scared? make it the last 15 minutes only. there exists a time where only those out there looking for a good deal will come in and buy out your leftovers but regular customers usually buy when they crave and don't wait until til evening.
Germany