The owner of a small store buys coats for ​$55.00 each. Answer parts a and b. a. She sells the coats for ​$99.00 each. What percent of the purchase price is the sale​ price? b. The owner increases the sale price by the same percent that you found in part a when she buys jackets for ​$45 and sells them. How many jackets must the owner buy for the total jacket sales to be at least ​$​390? Explain your answer.