Tulsa, Inc., planned and actually manufactured 180,000 units of its single product in 2017, its first year of operation. Variable manufacturing cost was $24 per unit produced. Variable operating (nonmanufacturing) cost was $9 per unit sold. Planned and actual foxed manufacturing costs were $360,000. Planned and actual foced operating (nonmanufacturing) costs totaled $350,000. Tulsa sold 110,000 units of product at $42 per unit. Read the requirements Requirement 1. Tulsa's 2017 operating income using absorption costing is (a) $420,000, (b) $280,000, (c) $630,000,(d) $770,000, or (e) none of these. Show supporting calculations Begin by selecting the labels used in the absorption costing calculation of operating income and enter the supporting amounts. Perform the calculations in this step, but select the correct operating income in the next step. (For amounts with a 50 balance, make sure to enter in the appropriate coll.) Absorption costing Revenues Cost of goods sold: Variable manufacturing costs Fixed manufacturing costs Gross margin 1. Tulsa's 2017 operating income using absorption costing is (a) $420,000, (b) $280,000, (c) $630,000, (d) $770,000, or (e) none of these. Show supporting calculations. 2. Tulsa's 2017 operating income using variable costing is (a) $640,000, (b) $420,000, (c) $280,000, (d) $630,000, or (e) none of these. Show supporting calculations