81. The following information pertains to Brian Stone Corporation: Beginning fixed manufacturing overhead in inventory $60,000 Ending fixed manufacturing overhead in inventory 45,000 Beginning variable manufacturing overhead in inventory $30,000 Ending variable manufacturing overhead in inventory 14,250 Fixed selling and administrative costs $724,000 Units produced 5,000 units Units sold 4,800 units What is the difference between operating incomes under absorption costing and variable costing? a. $750 b. $7,500 c. $15,000 Cl. $30,750