On April 30, the end of the first month of operations, Joplin Company prepared the following income statement, based on the absorption costing concept: Joplin Company Absorption Costing Income Statement For the Month Ended April 30 Sales (3,600 units) $104,400 Cost of goods sold: Cost of goods manufactured (4,100 units) Inventory, April 30 (600 units) $86,100 (12,600) Total cost of goods sold (73,500) Gross profit $30,900 Selling and administrative expenses Operating income (17,800) $13,100 If the fixed manufacturing costs were $19,803 and the fixed selling and administrative expenses were $8,720, prepare an income statement according to the variable costing concept. Round all final answers to whole dollars. Joplin Company Sales Variable Costing Income Statement For the Month Ended April 30 104,400 Variable cost of goods sold: Variable cost of goods manufactured 66,297 Inventory, April 30 9,702 Total variable cost of goods sold 56,595 9,702 X Manufacturing margin Variable selling and administrative expenses Contribution margin Fixed costs: Fixed manufacturing costs Fixed selling and administrative expenses Total fixed costs Operating income