A machine purchased a year ago for $85,000 costs more to operate than anticipated. At the time of the purchase, it was expected to be used for 10 years with annual maintenance costs of $22,000 and a salvage value of $10,000. However, last year, it incurred a cost $39,000, which is expected to escalate to $41,000 this year and increase by $2,000 each year thereafter. The market value is now estimated to be $82,000$11,000k, where k is the number of years since the machine was purchased. It is now estimated that the machine will be useful for a maximum of 7 more years. A replacement study is to be performed. Determine the values of P, n, AOC for year 7 and S of this defender.