Question 3 (adapted from Jan 2019 Question 2) RISW Limited ('RISW') manufactures wrist watches for various brands. The company designs and assembles products according to customers' specifications. RISW uses normal costing to cost its job orders and applies plant-wide manufacturing overhead (MOH) based on direct labour hours (DLH). RISW sells its products on fixed price or on cost plus basis. The watches are designed in the Design Department. Once the design is approved, the material is sourced from contract manufacturers and the products are manually assembled in the Assembly Department. The assembly workers are paid an hourly rate of $10 per DLH and the designers are paid a lump sum fee based on the complexity of each job. The designer is also responsible to oversee the completion of the assigned job order. In consideration of the added responsibilities, they are entitled to an incentive payment equal to 20% of gross profit (computed based on normal Page 2 of 5 product cost) for each job order completed within specified deadline. For product costing purposes, the company treats all bonuses and incentive payments as period expenses, and all spoilage as abnormal spoilage specific to each job. As such, the designer has incentive to complete the jobs in a cost effective and timely manner. RISW's budgeted MOH. DLH and Machine Hours (MH) for the year 2020 are estimated as follows. Design Department Variable MOH $1,200,000 DLH MH 4,000 4,800 Assembly Department Variable Assembly Department Fixed $600,000 $1,200,000 96,000 800 Appended below are relevant data for three job orders processed by RISW during December 2020. Job Order Quantity in units Contract Price Direct Materials Designer fee Assembly labour 40% assembled ** Normal Product Costs plus 30% #007 #008 4,000 2.000 $210.000 Cost plus** $90,000 $50,400 $2,000 $4,800 $22,500 $9.000 Boris, a designer and account manager for Jobs #007 and #008 complained that the company's policy on overhead application cost him to earn less incentive payment for both jobs. He suggests that MOH should be applied using departmental rates based on appropriate cost drivers. With the help of other designers, he obtained the machine times used in the Design department for Jobs #007 and #008 were 32 hours and 45 hours respectively. Required: Explain the basis of Boris's complaint with clear supporting computations.