Consider the market for socks. The current price of a pair of plain white socks is $5.00. Two consumers, Jeff and Samir, are willing to pay $7.25 and $8.00, respectively, for a pair of plain white socks. Two sock manufacturers are willing to sell plain white socks for as little as $4.00 and $4.15 per pair. a. $0.15 b. $8.15 c. $0.85 d. $1.00 e. $1.85