Bonita Industries uses job order costing for its brand-new line of sewing machines. The cost incurred for production during 2017 totaled $9,000 of materials, $5,000 of direct labor costs, and $2,000 of manufacturing overhead applied. The company ships all goods as soon as they are completed which results into finished goods inventory on hand at the end of the year. Beginning work in process totaled $6,000 and the ending balance is $3,000. During the year, the company completed 25 machines. How much is the cost per machine?

a.) $520

b.) $760

c.) $880

d.) $640

Please explain