A retailer sells a product for $16 after marking up 33,33% on consumer purchase price. The wholesaler's markup is 50% based on retailer purchase price. In this instance... both wholesaler and retailer markup are based on cost both wholesaler and retailer ma sup are based on selling price wholesaler markup is based on cost retailer markup on selling price wholesaler markup is based on selling price, retailer markup on cost All the other 4 answers are correct