(30 Marks) Earthworks is an excavation company which started its operations in the year 2015. The
board of governors set the Minimum acceptable rate of return for the company at 16% after-tax. Due
to the nature of their work, Earthworks own equipment which are in CCA class 8 (CCA rate = 20%).
For the 5 years following its inception, Earthworks purchased 4 Machines, two of which they ended
up selling. The record of their transactions is as summarized below