Knight company reports the following costs and expenses in may. factory utilities $16,800 direct labor $72,600 depreciation on factory equipment 14,350 sales salaries 46,700 depreciation on delivery trucks 4,200 property taxes on factory building 3,500 indirect factory labor 52,500 repairs to office equipment 1,700 indirect materials 84,300 factory repairs 2,970 direct materials used 138,700 advertising 16,700 factory manager’s salary 8,400 office supplies used 3,370 from the information:
(a) manufacturing overhead
(b) product costs
(c) period costs

Speedy auto repairs uses a job-order costing system. the company’s direct materials consist of replacement parts installed in customer vehicles, and its direct labor consists of the mechanics’ hourly wages. speedy’s overhead costs include various items, such as the shop manager’s salary, depreciation of equipment, utilities, insurance, and magazine subscriptions and refreshments for the waiting room. the company applies all of its overhead costs to jobs based on direct labor-hours. at the beginning of the year, it made the following estimates: direct labor-hours required to support estimated output 20,000 fixed overhead cost $ 350,000 variable overhead cost per direct labor-hour $ 1.00 required: 1. compute the predetermined overhead rate. 2. during the year, mr. wilkes brought in his vehicle to replace his brakes, spark plugs, and tires. the following information was available with respect to his job: direct materials $ 590 direct labor cost $ 109 direct labor-hours used 6