I need step bu step using the correct formulas. this is an example they used in book but I'm still confused

1-55 A purchased machine cost $320,000 with delivery and installation charges amounting to $30,000. The declared salvage value was $50,000. Early in Year 3, the company changed its product mix and found that it no longer needed the machine. One of its com petitors agreed to buy the machine for $180,000 Determine the loss, gain, or recapture of MACRS depreciation on the sale. The ADR is 12 years for this machine