Bryce $Co.$ sales are $$914,000,$ variable costs are $$498,130,$ and operating income $is$ $$196,000.$ The contribution

margin ratio $is$

$a.45\mathrm{.}5\%$

$b.54\mathrm{.}5\%$

$c.52\mathrm{.}2\%$

$d.28\mathrm{.}4\%$