ACME manufacturing is considering replacing an existing production line with a new line that has a greater output capacity and operates with less labour than the existing line. The new line would cost $1 million, have a 5-year life, and would be depreciated using the straight-line depreciation method over 5 years. At the end of 5 years, the new line could be sold as scrap for $200 000 (in year 5 dollars). Because the new line is more automated, it would require fewer operators, resulting in a saving of $40 000 per year before tax and unadjusted for inflation (in today's dollars). Additional sales with the new machine are expected to result in additional net cash inflows, before tax, of $60 000 per year (in today's dollars). If ACME invests in the new line, a one-time investment of $10 000 in additional working capital will be required. The tax rate is 30 per cent, the opportunity cost of capital is 10 per cent, and the annual rate of inflation is 3 per cent. What is the NPV of the new production line?

The alternative to investing in the new production line is to overhaul the existing line, which currently has both a book value and a salvage value of $0. It would cost $300 000 to overhaul the existing line, but this expenditure would extend its useful life to 5 years. The line would have a $0 salvage value at the end of 5 years. The overhaul outlay would be capitalised and depreciated using straight-line method of depreciation over 5 years. Should ACME replace or renovate the existing line?