Variable Costing Income Statement On April 30, the end of the first month of operations, Joplin Company prepared the follewing income statement, based on the absorption costing concept: If the fixed manufocturing costs were $450,000 and the foced selling ald administrative expenses were $165,000, prepare an income statement according to the varlable If the fixed manufacturing costs were $450,000 and the foxed selling and administrative expenses were $165,000, prepare an income statement according to the variabie costing concept