What should the ratio of male and female betta fish should I have at my store?

From what I have seen alot of people don't know the difference between male and female betta's. People usually buy betta's for the way they look and females aren't as pretty. If you're looking to sell, I personally would get more males. Keep a few female on hand just in case. If you are going to breed them, you'll need more males since the males care for the fry.