Evergreen Corporation manufactures circuit boards and is in the process of preparing next year's budget. The pro forma income statement for the current year is presented below. Sales $ 3,660,000 Cost of sales: Direct material $ 516,000 Direct labor 330,000 Variable overhead 283,000 Fixed overhead 680,000 1,809,000 Gross profit $ 1,851,000 Selling and General & Admin. Exp. Variable 766,000 Fixed 266,000 1,032,000 Operating income $ 819,000 The contribution margin ratio for the current year is: Multiple Choice a.52.5%. b.48.2%. c.45.3%. d.24.0%.