Exercise 1-15 (Algo) Traditional and Contribution Format Income Statements [LO1-6] The Alpine House, Incorporated, is a large retailer of snow skis. The company assembled the information shown below for he quarter ended March 31: Required: . Prepare a traditional income statement for the quarter ended March 31. 2. Prepare a contribution format income statement for the quarter ended March 31. 3. What was the contribution margin per unit