Please provide answer to Question number 3 and 4 with explanation.

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. Sales in units Sales revenue Less: Cost of goods sold Central Valley Company Comparative Income Statement March April 5,700 5.200 $735,300 $670,800 389,550 362,232 May 6.300 $812,700 422,604 June 7,400 $954,600 486,846 $345,750 $308,568 $467 754 Gross margin Less: Operating Expenses Shipping expense Advertising expense Salaries and commissions Insurance expense Amortization expense $ 62,900 80,500 162.900 12.500 45,500 $ 54,600 80.500 139.500 12,500 45.500 $390.096 $ 66,400 80,500 165.000 12,500 45 500 $369,900 $ 20 196 $ 67,500 80,500 177,000 12.500 45,500 $383,000 $ 84 754 Total operating expenses $364,300 $(18,550) $332,600 S (24032) Net income 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 = = = $ 67.710 + S 24.136 + $50,830 + $ 5 $ 56 64 per unit 586 per unit 17.05 per unit 2. Assume that fixed costs are incurred uniformly throughout the year. Compute the annual break-even sales, and the profit if 73,000 units are sold during the year. (Round "Break-even sales" answer to nearest whole number.) Break-even sales Annual profit (73,000 units) 68,233 units 235,738 $ 3. Calculate the change in profit if the selling price were reduced by $7.5 each and annual sales were to increase by 6,400 units. Decrease in profit 3. Calculate the change in profit if the selling price were reduced by $7.5 each and annual sales were to increase by 6,400 units. Decrease in profit 4. Determine the change in profit if the company were to increase advertising by $107.000 and if this were to increase sales by 6.400 units Incremental profit