Regarding its common stock, Entity K has $12,500$ authorized shares, $3,600$ issued shares, and $500$ treasury shares that it recently purchased. What is the number of outstanding shares?

Regarding its common stock, Entity K has $12,500$ authorized shares, $3,600$ issued shares, and $500$ treasury shares that it recently purchased. What is the number of outstanding shares?

$8,900.$

$3,600.$

$3,100$

$4,100.$