You supervise an aging production line that constantly needs maintenance and new parts. Last month you spent $25,000 replacing a failed controller. Should the following plan be accepted if the interest rate is 15%? The net installed cost of the new line to replace the old line is $600,000 with a useful life of six years. In the first year its operating cost will be $100,000 and it will generate annual revenues of $300,000. Each year the operating cost will increase by $5,000 and the revenues will fall by $15,000. After six years the equipment will have a value of $100,000 in the next re-building of the line.