This is part 1 for the letter M. We talk about Margin.  The difference between the selling price of a product or service and its costs. The higher the margin, the more profit that is made. We discuss the costs and compare that to a true profit margin. Many factors go into determining our profit margin. Relevant links:expressokids.comexpresso-steam-foundation.orgtechexpressoconsulting.comexpressobookstore.comEntrepreneur AZ Quick Reference Flashcards   (Slideshare)  The Complete Quick Reference to Keywords and topics for New and Seasoned Entrepreneurs.