What is the$$present value$$of cash flows of $$500$ at the$$end of$$years $1$ through $5,$ plus a cash flow of negative $$500$ at the$$end of$$year $6,$ and cash flows of $$1,000$ at the$$end of$$years $7-10$ if the appropriate discount rate is $10\%?($hint$,$ lay it out on a time line the complex cash flows, and make sure you know which are positive and which are negative flows, then apply the formulas to bring the values back to the present$)$