Question: Brownsville, Texas, boasts being the southernmost international seaport and the largest city in the lower Rio Grande Valley. Ben Supple, an importer in Brownsville, has just received a shipment of Peruvian opals that he is pricing for sale. He paid $101 for the shipment. Assume he wants a 80% markup. Calculate the selling price when the markup is based on selling price. Selling price when the markup is based on selling price.