The market for French champagne in a small village consists of two consumers: Antoine and Bruce. Antoine's monthly demand curve is: x A =200.1p, for p200 and x A =0 for p>200 Bruce's monthly demand curve is: x B =100.2p, for p50 and x B =0 for p>50 What is monthly aggregate consumer surplus if the consumers can buy French champagne at the price of p=20 ? $2190 $1710 $1095 $480