How do you do 4&5 of this question?

Gitano Products operates a job-order costing system and applies overhead cost to jobs on the basis of direct materials used in production (not on the basis of raw materials purchased). lts predetermined overhead rate was based on a cost formula that estimated $113,100 of manufacturing overhead for an estimated allocation base of $87,000 direct material dollars to be used in production. The company has provided the following data for the just completed year: Purchase of raw materials Direct labor cost Manufacturing overhead costs $138,000 $ 83,000 Indirect labor Property taxes Depreciation of equipment Maintenance Insurance Rent, building $118,800 $ 8,800 $15,000 $15,000 $11,100 $ 37,000 Raw Materials Work in Process Finished Goods Beginning Ending $ 29,000 $12,000 $ 49,000 $40,000 $ 72,000 $59,000 Required 1-a. Compute the predetermined overhead rate for the year Predetermined overhead rate 1301% 1-b. Compute the amount of underapplied or overapplied overhead for the year. Underapplied overhead 4,200