Assume a machine costs $$280,000$ and lasts six years before it is replaced. The operating cost is $$30,600$ a year. Ignore taxes. What is the equivalent annual cost if the required rate of return is $11\mathrm{.}8$ percent? $($Hint: the EAC should account for both investment and annual operating costs$)$

$$100,595\mathrm{.}03$

$$98,317\mathrm{.}88$

$$96,040\mathrm{.}73$

$$93,763\mathrm{.}58$

$$91,486\mathrm{.}43$