I just need help with part b for both questions the multiple choice

2. Change all of the numbers in the data area of your worksheet so that it looks like this 1 Chapter 3: Applying Excel 2 3 Data 4 Allocation base Machine-hours Estimated manufacturing overhead cost 6 Estimated total amount of the allocation base 7 Actual manufacturing overhead cost 8 Actual total amount of the allocation base $ 600,400 9,000 machine-hours 76,000 machine-hours $ 611,700 If your formulas are correct, you should get the correct answers to the following questions. (a) What is the Predetermined overhead rate? (Round your answer to 2 decimal places.) Pre determined overhead $ 7.60 per machine- $ 7.60 hour rate (b) By how much is the manufacturing overhead underapplied or overapplied? Underapplied manufacturing $ 34,100