Rex Electric has decided to move into low-rise ( 2 to 8 floors) commercial building electrical wiring. After great success in upscale residential and small commercial wiring, they have identified four independent and indivisible investments, any or all of which will help make the move to the next level. Rex Electric's MARR is 10%, and $500,000 is available for investment immediately, with $175,000 available for follow-up investment the next year. The cash flows are shown below. What is the present worth for the selected investment portfolio? $