You are considering two alternative machines, Machine A and Machine B$,$ for a manufacturing process. One of the machines, Machine A$,$ costs $$42,000$ to set up and $$5,000$ per year to operate, but It must be completely replaced every $6$ years, and it has no salvage value. Assuming the cost of capital is $9\mathrm{.}9\%,$ what is the equivalent annual cost of the machine?