please answer

A building contractor can purchase a transit mixer truck for P120000. Its estimated life is 6 years. Annual maintenance cost is P3500 and its daily operating expense is P200, salary of the driver is P400 a day. Taxes and insurance is 2% of the cost of the truck. 2 Company, a rm dealing with heavy equipment has a similar truck for hire at P1800 a day which includes the service of the driver. If money is worth 6%, if the transit mixer is needed by the contractor for an average of 180 days per year, determine the payback period if the contractor decided to purchase his own transit mixer