p 185 PE 5-1B EE 5-1 Variable costing OBJ. 1 Marley Company has the following information for March: $912,000 Sales 474,000 Variable cost of goods sold Fixed manufacturing costs Variable selling and administrative expenses Fixed selling and administrative expenses 82,000 238,100 54,700 Determine (a) the manufacturing margin, (b) the contribution margin, and (c) income from operations for Marley Company for the month of March