RJ Millworks is planning on purchasing a large resawing band saw for $30,000. The saw has a useable timespan estimated to be seven years, at which point it will have an estimated salvage value of $8,000. Annual income each year for the 7 years is $9000. Annual operating expenses are $3,000. What is the present worth, annual worth, future worth, and internal/external rate of return? Assume MARR = 7.5% and the planning horizon is 7 years. Use excel and type out equations used.