A firm is considering purchasing computers that will reduce annual costs by P40,000. The Computers costs P300,000 and has a salvage value of P50,000 and a life of 7 years. The annual maintenance cost is P6,000, while not in use by the firm, the computers can be rented to others to generate an income of P10,000 per year. If money can be invested for an 8% return, using the annual cost method, how much is the savings or excess cost the firm has in buying the computers?