Builtrite is considering purchasing a new machine that would cost $$70,000$ and the machine would be depreciated $($straight line$)$ down to $$0$ over its five year life. At the end of four years it is believed that the machine could be sold for $$18,000.$ The current machine being used was purchased $3$ years ago at a cost of $$40,000$ and it is being depreciated down to zero over its $5$ year life. The current machine's salvage value now is $$20,000.$ The new machine would increase EBDT by $$46,000$ annually. Builtrite's marginal tax rate is $34\%.$

What is the TCF associated with the purchase of this machine if it is sold at the end of year $4($NOT year $5)?$

$$4,000$

$$11,880$

$$16,640$

$$18,000$