a)A dining room set costs $400, less 30% and 10%. The overhead expenses are 25% of cost and operating profit is 30% of cost. What is the break-even price of the set?

b)A dining room set costs $400, less 30% and 10%. The overhead expenses are 25% of cost and operating profit is 30% of cost. After three months, the set is reduced to $200. What was the operating profit or loss of the set at the reduced price?