A machine costing $214,800 with a four-year life and an
estimated $20,000 salvage value is installed in Luther Company’s
factory on January 1. The factory manager estimates the machine
will produce 487,000 units of product during its life. It actually
produces the following units: 121,800 in 1st year, 122,600 in 2nd
year, 121,500 in 3rd year, 131,100 in 4th year. The total number of
units produced by the end of year 4 exceeds the original
estimate—this difference was not predicted....