(At around 3:44) there is a red sign behind Keye Luke that reads: "Beer .25 cents," even though Mayberry is a dry county.
Charlie estimates that turning the spare rib tavern into a Chinese restaurant would take about $400. But by the time the restaurant opens there's been a massive change in decor, furniture, tableware, and interior structures, including the removal of the large counter that was in the main room of the tavern. The silk clothes that Aunt Bee and Jack wear could have totaled up to $100 all by themselves.