Attayo Corporation prepares an absorption costing income statement for external purposes but a variable costing income statement for internal purposes. Which of the following is true regarding fixed overhead from the internal perspective? Multiple Choice O Ped overhead is not used in the income statement. Fored overhead is used to calculate contribution margin Fored overhead in grouped with variable overhead and the two are treated the same way Fored overhead is used to calculate operating income but not contribution margin Fored overhead is included in the cost of riventory