Standard Appliances obtains refrigerators for $1,630 less 30% and 10%. Standard's overhead is 19% of the selling price of $1,660. A scratched demonstrator unit from their floor display was cleared out for $1,305. a. What is the regular rate of markup on cost for a demonstrator unit? % b. What is the rate of markdown on the demonstrator unit? % Round to two decimal places c. What is the operating profit or loss on the demostrator unit? d. What is the rate of markup on cost that was actually realized for the scratched demonstrator unit? % Round to two decimal places