Assume that all cash and short$-$term investments are excess cash. Based on the information provided, what is the best estimate the unlevered cost of capital for Cowbell? Select one.

$1\mathrm{.}6\mathrm{.}80\%$

$2\mathrm{.}5\mathrm{.}60\%$

$8\mathrm{.}15\%$

$6\mathrm{.}91\%$

$5\mathrm{.}5\mathrm{.}02\%$