Suppose that the shadow price for assembly time is $$\frac{5}{?}$ hour. The allowable increase for the assembly time constraint is $40$ hours, and the allowable decrease is $30$ hours. How much additional profit can the company make if it can increase the assembly time by $10hrs?$

A$)$ $$50$

B$)$ no additional profit is possible because the allowable increase for assembly time is $40$ hours

C$)$ $$200$

D$)$ additional profit is only possible if the company hires one more employee

E$)$ $$!50$