Sheridan Company produces flash drives for computers, which it sells for $$12$ each. Each flash drive costs $$9$ of variable costs to make. During April, $1000$ drives were sold. Fixed costs for March were $$2$ per unit for a total of $$1000$ for the month. What is the contribution margin ratio?

$8\%$

$45\%$

$25\%$

$92\%$