An investment of $20,000 is to be made on a computer system that will last for 6 years and have a zero salvage value at that time. Operating, maintenance and software costs are projected to be $15,000 the first three years and $20,000 the last 3 years. The minimum attractive rate of return is to be 12% (per year). Determine for this investment the following:
Present worth
Annual worth
Future worth