Required information [The following information applies to the questions displayed below.] Equipment costing $21,600 with a 5-year useful life and an estimated $3,600 salvage value is acquired and started operating on January 1. The equipment is estimated to produce 3,000 units of product during its life. It produced 450 units in the first year. Record the journal entries for equipment depreciation for the first year under straight-line, units-of-production, and double-declining- balance. View transaction list Journal entry worksheet A B C Record depreciation for the first year under straight-line.