4. Dayton Corp. manufactures irrigation systems. The company uses variable costing for internal management reports and absorption costing for external reports to shareholders, creditors, and the government. The company has provided the following data: : SHOW YOUR CALCULATIONS for those questions that require calculations! = Beginning Inventory 1200 units, ending inventory 1400, Fixed MOH per unit = $150 Variable costing operating income $400,000. What is absorption costing operating income? $