Klockis incorporated uses a job-order costing system and a predetermined overhead rate based on machine hours. At the beginning of the year, the company estimated manufacturing overhead for the year would be $159,900 and machine hours would be 8,200 hours. The following information pertains to March of the current year: Job 18 Job 19 Job 20 Total Work in Process, March 1 $17,000 $22,500 $35,400 $74,900 March production activity: Materials used $4,500 $4,650 $7,100 $16,250 Direct labour used $2,000 $3,250 $3,800 $9,050 Machine hours 550 830 890 2,270 Labour hours 120 20 215 230 565 Required: 1. Calculate the predetermined overhead rate (POHR). 2. Complete a brief job-order cost sheets for the 3 jobs for the month of March. (Hint: this requires applying overhead using the rate calculated in part 1 above). 3. At the end of the March Jobs 18 and 20 were completed, and Job 18 was sold and delivered to a customer-show the ending balances of the Work in Process and Finished Goods Inventory accounts (assume no beginning Finished Goods inventory). 4. If actual manufacturing overhead costs are $48,000, what is the amount of over or under-applied overhead for March