The product is not the only thing in a business and that is why every business produces profit differently. You must focus on management schemes. The management in your business is its backbone. It can either make you stand still if it is strong, whereas its weakness can break you down.
You must scan from top to bottom and keep in mind detail of the things in well-defined categories under strong supervision. Remember that by management we don't mean the well-qualified graduates only. In a small business, you are not able to hire people as such, so you must acknowledge that in small businesses, everyone in your lead is a part of your management.