A printing press machine has a cash equivalent of P250,000. For the first three years, it will ovide P20,000 worth of profit each year. For the next four years, annual profit will be P35,000. For the last two years, expenses will exceed revenues and will have a loss of P10,000 each year. Calculate the acceptability of this investment using F W method if MARR is 18% per year. What is ERR if E = 15%