A ravaging problem among SMEs is the issue of sales. They usually sell a product to a person or a few persons and that's all. They rarely sell that product again and it makes the business not do well in sales.
I have put together 5 ways you can sell just one product over and over again and increase your income.
An earned income is that which you receive at the end of the agreed/stated cycle or on the sales of a product. A passive income is that which you receive continuously until you decide that you are no longer interested in investing, or no longer in business.