Brandon buys a piece of equipment for $$15,000.$ He pays $$5,000$ for upgrades in year $1$ and the equipment generates $$2,000$ in cash flow for year $1.$ In year $2$ the equipment generates $$8,000,$ in year $3$ it generates $$4,000,$ but Brandon sells it for $$6,000$ but also pays a $$500$ commission. Assume a required rate of return of $8\%.$ What is the NPV$?$