Change the estimated total amount of the allocation base back to 80,000 machine-hours, so that the data area of you worksheet looks exactly the same as in Requirement 2. Now change the actual manufacturing overhead cost from $604,000 to $595,800. The data area of your worksheet should now look like this:

4 Allocation base Machine-hours Estimated manufacturing overhead cost $468,000 Estimated total amount of the allocation base machine- 72,000 hours Actual manufacturing overhead cost $488,800 Actual total amount of the machine- 8 78,000 allocation base hours (a)By how much is the manufacturing overhead underapplied or overapplied? manufacturing overhead (b)Why is the amount of underapplied (overapplied) manufacturing overhead different from Requirement 2 above? (Select all that apply.) The predetermined overhead rate changed. The change in the actual manufacturing overhead cost directly resulted in a comparable change in the amount of underapplied (overapplied) manufacturing overhead. OThe change in the estimated total amount of the allocation base affected the amount of manufacturing overhead applied.