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Convert Departmental Data to Plantwide Data, Plantwide Overhead Rate, Apply Overhead to Production At the beginning of the year, Jonson Company estimated the following: Firing Polishing Total Department Department Overhead $405,000 $110,000 $515,000 Direct labor hours 28,750 100,000 128,750 Kiln hours 90,000 90,000 Assume that Jonson has decided to use a plantwide overhead rate based on direct labor hours. Actual data for the month of July are as follows: Firing Polishing Total Department Department Overhead $34,000 $9,370 $43,370 Direct labor hours 2,350 8,600 10,950 Kiln hours 7,400 7,400 Required: 1. Calculate the predetermined plantwide overhead rate.Assume that Jonson has decided to use a plantwide overhead rate based on direct labor hours. Actual data for the month of July are as follows: Firing Polishing Total Department Department Overhead $34,000 $9,370 $43,370 Direct labor hours 2,350 8,600 10,950 Kiln hours 7,400 7,400 ' Required: 1. Calculate the predetermined plantwide overhead rate. $:] per direct labor hour 2. Calculate the overhead applied to production for the month of July. $[:1 3. Calculate the overhead variance for the month of July. (