Suppose that in a double action market there are eight sellers and 6 sellers. The buyers can purchase up to 1 unit each, and the sellers can sell up to 1 unit each. The following are the costs and values used in the experiment.

Costs: 7,10,9,9,6,10,8,8 values: 7,9,10,7,10,9

Find the maximum feasible gains in this market.