Koebel Corporation uses a job order cost system with manufacturing overhead applied to products on the basis of direct labor hours. For the upcoming year, Koebel Corporation estimated total manufacturing overhead cost at $610,800 and total direct labor hours of 50,900. Koebel Corporation started the year with no beginning balances in either Work in Process Inventory or Finished Goods Inventory. During the year, actual manufacturing overhead incurred was $600,000 and 48,000 direct labor hours were used. Required: a. Calculate the predetermined overhead rate. b. Calculate how much manufacturing overhead will be applied to production. c. Is overhead over- or underapplied? By how much? d. What account should be adjusted for over- or underapplied overhead? Should the balance be increased or decreased? Complete this question by entering your answers in the tabs below. Calculate the predetermined overhead rate. Wentzel, Incorporated, uses a traditional volume-based costing system in which direct labor hours are the allocation base. Wentzel produces two products: Product A, which uses 260,000 direct labor hours, and Product B, which uses 140,000 direct labor hours. Wentzel is considering switching to an ABC system by splitting its manufacturing overhead cost of $712,000 across three activities: Design, Production, and Inspection. Under the traditional volume-based costing system, the predetermined overhead rate is $1.78 per direct labor hour. Under the ABC system, the cost of each activity and proportion of the cost drivers used by each product are as follows: Required: a. Calculate the indirect manufacturing costs assigned to Product A under the traditional costing system. b. Calculate the indirect manufacturing costs assigned to Product B under the traditional costing system. c. Calculate the indirect manufacturing costs assigned to Product A under the ABC system. d. Calculate the indirect manufacturing costs assigned to Product B under the ABC system. e. Which product is undercosted and which is overcosted under the volume-based cost system compared to ABC? Complete this question by entering your answers in the tabs below. Calculate the indirect manufacturing costs assigned to Product A under the traditional costing system