Denman Ski and Cycles purchased 200 pairs of ski boots for $300 per pair. The regular rate of markup on selling price on the boots is 36%. The store's overhead is 16% of the selling price. During a clearance sale, the price was reduced to $413 per pair.

a) What is the regular selling price?

b) At the sale price, what was dollar amount of the markup?

c) What was the profit or loss on each pair of boots at the sale price?