This varies greatly depending on whether it is food or clothing and etc. Your profit margin depending on what you are selling could work on volume such as food creating a low profit of 1 percent to 15 percent. Then if you take the profit of items specially made or floral it could range as much as 45 percent to 65 percent. Then of course you have to deduct all your cost to figure it all out. That is why big business stays in business and the little business people just float along hoping not to sink!