Swifty Corporation produces flash drives for computers, which it sells for $$25$ each. Each flash drive costs $$14$ 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?

$64\%$

$44\%$

$70\%$

$36\%$