You now have your store. Here are a couple of tips. Arrange the shelves so that there is enough space between them. Put expensive items in a more prominent place. Don't forget about vending machines. Change the wallpaper and flooring to a nicer one. Always say thank you to your customers.

Apple and grape juice is awesome. But cider and wine are even better. You've got a farm and a store (thanks to your grandma). Farm resources, set up machines and produce alcohol, cigarettes, and maybe something else. Sell of the goods in your store. It's going to be awesome. Grandma will appreciate it.

It is important to have a good relationship with your neighbors. It's great that your neighbors are such wonderful people now. Or rather, animals. Don't forget to say hello to them and they will tell you their life stories in return.