$\backslash$table$[[($dollars per t$-$shirt$),($t$-$shirts per month$),($t$-$shirts per month$)],[3,150,300],[4,160,280],[5,170,260],[6,180,240],[7,190,220],[8,200,200],[9,210,180],[10,220,160],[11,230,140],[12,240,120]]$

Time left $1$:$39$:$35$

Refer to Table $3\mathrm{.}5\mathrm{.}3.$ A new store opens up on the edge of campus, Great Wild North Sportswear, which has the capacity to do as much business as all the existing businesses. The quantity of t$-$shirts supplied doubles at each price. The new equilibrium price is and the new equilibrium quantity i t$-$shirts per month.

Select one:

a$.8$;$400$

b$.3$;$300$

c$.0$;$400$

d$.16$;$200$