colonnade corporation purchased a machine for use in the firm's manufacturing process. the original cost of the machine was $1,800,000. the machine has a class life of 15 years, but after 13 years, the firm has decided to sell the machine for $320,000. if colonnade has a marginal tax rate of 34%, what is the tax effect associated with the decision? assume the machine was depreciated straight-line over the 15-year life to zero salvage value.