Company X needs a PC type computer to use for its accounting, warehouse and other tasks. PC type computers can be rented for $50 per day, including maintenance service. It is possible to buy the same type of computers from the market for $25,000. It is estimated that the useful life of the computer will be 15 years, and the scrap value at the end of this period will be $ 4,000. Annual maintenance costs will be approximately $2,800. If the interest rate is 9% and the cost of using the computer is $50 a day, how many days per year should the computer be used for the two alternatives to be head-to-head