A machine with a $6-$year life costs $$10,000$ today, and will have annual after$-$tax operating expenses of $$2,500$ at years t $=1,$ t $=2,$ t $=3,$ t $=4,$ t $=5,$ and t $=6($each year the expense is $$2,500).$ There are no other cash flows associated with this machine. The firm's cost of capital is $10\%$ per year. What is the EAC $($equivalent annual cost$)$ for this machine?