4. Change the estimated total amount of the allocation base back to 85,000 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 $684,300 to $692,500. The data area of your worksheet should now look like this: (a) By how much is the manufacturing overhead underapplied or overapplied? (b) Why is the amount of underapplied (overapplied) manufacturing overhead different from Requirement 2 above? (You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answers and double click the box with the question mark to empty the box for a wrong answers. Any boxes left with a question mark will be automatically graded as incorrect.) The predetermined overhead rate changed