The Justin Company is a merchandising firm that sells a single product. The company's revenues and expenses for the last two months are presented below: December 6,000 November Sales in units Sales revenues Cost of goods sold Gross margin Operating expenses 4,000 $480,000 200,000 280,000 $720,000 300,000 420,000 Advertising Commissions Depreciation 52,000 135,000 60,000 33,000 72,000 195,000 60,000 93,000 Operating income Required: 1. By use of the high-low method, state the cost formula for each expense/cost. Prepare a contribution income statement for January if sales are expected to be 8,000 units and the price and cost structure remain the same as November and December. Calculate the break-even point in units for January Calculate the margin of safety for January 2. 3. 4