It certainly appears that the award should be not include the cost of the renting the booth since that expense was incurred prior to entering the contract.
The court notes this fact: The "plaintiff ... had rented space at the exhibit before entering into the contract with defendant for the shipment of the exhibit and this part of plaintiff's damages ... arose out of a circumstance which transpired before the contract was even entered into." The court nonetheless includes the booth rental in its reliance award.