What is the producer surplus if the price is equal to $1,680, $1200, $840, $240?

$2,500 $2,250 $2,000 $1,750 $1,500 $1,250 $1,000 $750 $500 $250 $0 Cost Functions of a Firm $2,28 $1,980 $1,608 $1,680 $1,380 $1,200 $1,251 $1,200 $660 $240 $120 -2 2 $60 3 4 $120 1 5 $240 6 $840 $480 7 8 Output Produced (q) 9 1,200 10 $1,342 $1,248 11 12