please show all steps and formulas used.

Analyzing Activity in Inventory Accounts Selected data concerning operations of Cascade Manufacturing Company for the past fiscal year follow: Determine each of the following: (a) Cost of raw materials purchased $ (b) Prepare a contribution income statement using variable costing. (Do not use negative signs with your answers.) Analyzing Activity in Inventory Accounts Selected data concerning operations of Cascade Manufacturing Company for the past fiscal year follow: Determine each of the following: (a) Cost of raw materials purchased $ (b) Prepare a contribution income statement using variable costing. (Do not use negative signs with your answers.)