E2-9 EXERCISE 2-9 Job-Order Costing and Decision Making LO2-1, LO2-2, LO2-3 Tiveras Corporation is currently operating at 50% of its available manufacturing capacity. It uses a job-order costing system with a plantwide predetermined overbead rate based on machine hours. At the beginning of the year, the company made the following estimates Machine hours required to support estimated production Foxed manufacturing overhead cost 165.000 $1,980,000 Variable manufacturing overhead cost per machine hour $2.00 Required: 1. Compote the plantwide predetermined overhead rate. 2. During the year, Job P90 was started, completed, and sold to the customer for $2.500. The following information was available with respect to this job Direct materials Direct labor cost $1.150 $830 Machine hours used 72 Compute the total manufacturing cost assigned to Job P90. 3. Upon comparing Job P90's sales revenue to its total manufacturing cost, the company's chief financial officer said. "If this exact same opportunity walked through our front door tomorrow, I'd turn it down rather than making it and selling it for $2.500" a Construct an argument (supported by numerical analysis) that refutes the chief financial officer's assertion. b. Construct an argument (accompanied by numerical analysis) that supports the chief financial officer's assertion