Variable Costing Income Statement On April 30, the end of the first month of operations, Joplin Company prepared the following income statement, based on the absorption costing concept: If the fixed manufacturing costs were $34,560 and the fixed selling and administrative expenses were $14,990, prepare an income statement according to the variable costing concept. Round all final answers to whole dollars. If the fixed manufacturing costs were $34,5$0 and the fixed selling and administrative expenses i Feedback Check My Work Sales - (Variable Cost of Goods Manufactured* - Variable Costing Ending inventory**) = Manufacturing Margin; Manufacturing Margin - Variable Selling and Administrative Expenses = Contribution Margin; Contribution Margin - (Fixed Manufacturing Costs +