Digital Devices plans to stop carrying the Casio FC-100 calculator. It normally marks up the calculator from the $75.10 wholesale cost to the regular selling price of $111.95. a. What is the normal rate of markup on selling price? (Do not round intermediate calculations and round final answer to 1 decimal place.) Rate of markup % b. What rate of markdown can be advertised if Digital Devices wishes to clear out the stock at the wholesale cost? (Do not round intermediate calculations and round final answer to 1 decimal place.)