help please

(18 pts) 5. Berti Corporation manufactures and sells a single product. Cost data for the product are given below: The product sells for $150 per unit. Production and sales data for September follow: There was no beginning inventory. Required: a) Determine the unit product cost under: - Absorption costing - Variable costing b) Prepare a variable costing income statement for September. c) Prepare an absorption costing income statement for September. d) Explain why the operating income is different in parts (a) and (b)