Not making money!

Edit Subject

Hello, so in my game I will go back and check every half an hour or so, but recently when I go back to check I've gained no money from sales. I do have stuff on counters for sale, but for some reason unless I am physically watching the people eat and buy things I won't make any money nor will my food cook. I am unsure if others are having this issue, but if you could fix it I would be so pleased. Thank you!