Dream Threads Company sells hand $-$ sewn shirts for $$40$ per shirt. It incurs monthly fixed costs of $$4,000.$ The contribution margin ratio is calculated to be $50\%$ in units? $($Round your answer up to the nearest whole unit.$)$

A$.100$ units

B$.80$ units

C$.2,000$ units

D$.200$ units

Product A has a variable cost of $$16$ per unit and product $B$ has a variable cost of $$11$ per unit. If a company makes $160$ units of Product A and $160$ units of for both products?

A$.$ $$5,120$

B$.$ $$1,760$

C$.$ $$2,560$

D$.$ $$4,320$