Advertising Sales salaries and commissions Delivery of pianos to customers... Utilities Depreciation of sales facilities. Administrative: Executive salaries $400 per month $700 per month, plus 6% of sales $50 per piano sold $250 per month $500 per month $3,900 per month Insurance Clerical Depreciation of office equipment $100 per month $1,200 per month, plus $30 per piano sold $100 per month During November, WestCo sold and delivered 80 pianos. Prepare an income statement for WestCo for November using the contribution margin format, with costs organized by behavior. Show costs and revenues on both a total and a per unit basis down through contribution margin. Sales WestCo Income Statement For Month Ended November 30 Variable costs: Cost of goods sold Sales commissions Delivery of pianos to customers. Clerical Total variable costs Contribution margin_ Fixed costs: Advertising Sales salaries Utilities Depreciation of sales facilities Executive salaries Insurance Clerical Depreciation of office equipment Total fixed costs Operating income (loss) Total Per Piano