Complex Job costing information using equivalent units. The Custer Manufacturing Corporation, which uses a job order cost system, produces various plastic parts for the aircraft industry. On October 9, Year 1, production was started on Job No. 487 for 100 front bubbles (windshields) for commercial helicopters.

Production of the bubbles begins in the Fabricating Department, where sheets of plastic (purchased as raw material) are melted down and poured into molds. The molds are then placed in a special temperature and humidity room to harden the plastic. The hardened plastic bubbles are then removed from the molds and hand-worked to remove imperfections. After fabrication, the bubbles are transferred to the Testing Department, where each bubble must meet rigid specifications. Bubbles that fail the tests are scrapped, and there is no salvage value.

Bubbles passing the tests are transferred to the Assembly Department, where they are inserted into metal frames. The frames, purchased from vendors, require no work prior to installing the bubbles.

The assembled unit is then transferred to the Shipping Department for crating and shipment. Crating material is relatively expensive, and most of the work is done by hand. The following information concerning Job No. 487 is available as of December 31, Year 1 (the information is correct as stated):