Mr. Asimov must replace the 15 robots on his assembly line. The Robo 100 model costs $46,557 per robot and they will last for three years. The EconoRobo model costs $13,022 per robot and will last for two years. The Robo 100 models will have an end of life salvage value of $7,361 each. The EconoRobo models will not have any value at the end of their lives. The Robo 100 models are also more energy efficient and it is estimated Mr. Asimov will be able to save a total of $8,644 per year in energy costs. Mr. Asimov uses a MARR of 10% to evaluate potential investments. Using present worth analysis, what is the present worth of the EconoRobo system