The Central Valley Company is a manufacturing firm that produces and sells a single product. The company's revenues and expenses for the last four months are given below Central Valley Company Comparative Income Statement ril 5,000 May 6,000 June March 5,500 Sales in units Sales revenue Less: Cost of goods sold 7,000 $726,000 $660,000 $792,000 $924,000 384,250 356,400 411,840 471,240 $341,750 $303,600 $380,160 $452,760 Gross margin Less: Operating Expenses Shipping expense Advertising expense Salaries and commissions Insurance expense Amortization expense $ 62,500 $ 55,000 $ 66,000 68,500 77,500 178,000 11,500 44,500 77,500 162,300 11,500 44,500 77,500 140,500 11,500 44,500 77,500 164,000 11,500 44,500 Total operating expenses $358,300 $329,000 $363,500 $380,000 Net income S (16,550) $(25,400) $16,660 $ 72,760 Required 1. Management is concerned about the losses experienced during the spring and would like to know more about the cost behaviour. Develop a cost equation for each of the costs. (Do not round intermediate calculations. Round "Per Unit" answers to 2 decimal places.) Cost of goods sold Shipping Salaries & commission per unit per unit per unit