Four people:
Person A whose profit is 84X-6X^2
Person B whose profit is $30-6X
Person C whose profit is $75-10X
Person D whose profit is $100-8X
Person A has property rights, meaning they can set the value of X from 0 to 8. Each person must have the same cost of negotiation with each other. What is the minimum per person transaction cost that would result in no bargaining at all?