You are considering two alternative machines, Machine A and Machine B$,$ for a manufacturing process. One of the machines, Machine $A,$ costs $$27,000$ to set up and $$7,000$ per year to operate, but It must be completely replaced every $7$ years, and it has no salvage value. Assuming the cost of capital is $11\mathrm{.}7\%,$ what is the equivalent annual cost of the machine?

$$5,260$

$$6,910$

$$8,210$

$$9,860$

$$11,160$

$$12,860$