I need a complete answer and solution, I will give an upvote.

Graham Company currently uses four machines to produce 400,000 units annually. The machines were bought three years ago for P 50,000 each and have an expected useful life of 10 years with no salvage value. These machines cost a total of P 30,000 per year to repair and maintain. The company is considering replacing the four machines with one technologically superior machine capable of producing 400,000 units annually by itself. The machine would cost P 140,000 and have an estimated useful life of seven years with no salvage value. Annual repair and maintenance costs are estimated at P 14,000. Assuming straight-line depreciation and a 30% tax rate, determine the annual additional after-tax net cash inflow if the new machine is acquired.