Marissa's fashions purchases designer boots from a manufacturer for $50.88 per pair. marissa then adds a certain amount to the price of the boots as a markup when she sells them in the store. the total cost for a customer buying the boots at the store is $90.10. this includes a 6.25% sales tax that is added after the markup. the percent of markup before tax is about %, which is a markup of $ per pair of boots.