Use the following generalized linear supply function to answer this question: Qs $=40+6$P $8$P$1+10$F$,$ where Qs is the quantity supplied of the good, P is the price of the good, P$1$ is the price of an input, and F is the number of firms producing the good.

Now suppose P$1=$ $$40$ and F $=50,$ what is the largest amount of the good that firms will supply when the price of the good is $$20?$

Group of answer choices

A$.340$ units

B$.80$ units

C$.120$ units

D$.220$ units