According to the following article, selling bottled water is the most profitable, 1000%. But selling fruits and vegetables, although they are marked up 50%, is not as profitable because 20% have to be thrown away. So Bbanbob, do you think that mortgage loans have 1000% profit, i.e. if you have a 100K home loan, you will end up paying 1 Million? http://smallbusiness.chron.com/supermarkets-determine-markup-produce-cigarettes-80905.html