John wants to buy a new machine for his industry. Its going to cost $500,000 and has a salvage value of $19,000 after 6 years. Annual operating costs are $95,000. It also costs $10000 a year to hire an operator for the machine. If at year 0 john sells his current machine for $6,000 and purchase a new machine, how much will he need to generate in revenue to make a 8% rate of return?