its a whole questions all of them are parts of just one question ....i always post my question like that and got the answers ....

Homeward Hardware buys cat litter for $6 less 20% per bag. The store's overhead is 45% of cost and the owner requires a profit of 20% of cost. (a) For how much should the bags be sold? (b) What is the amount of markup included in the selling price? (c) What is the rate of markup based on selling price? (d) What is the rate of markup based on cost? (e) What is the break-even price? (f) What operating profit or loss is made if a bag is sold for $7.50? (a) The bags should be sold for $0 (Round to the nearest cent as needed.) rce (b) The amount of markup included in the selling price is (Round to the nearest cent as needed.) (c) The rate of markup based on selling price is % (Round to two decimal places as needed.) (d) The rate of markup based on cost is %