10. NailsRUs, Inc., agreed to buy from Gelco, Inc., as much nail gel polish as NailsRUs might desire to order at a price of $14.47 per case. NailsRUs ordered 1000 cases of nail gel polish. Gelco delivered 500 cases and said that it wouldn't deliver any more. NailsRUs sued Gelco for damages based on the failure to deliver the additional 500 cases of the order. a. The underlying agreement contained an illusory promise which did not bind NailsRUs to the agreement. Consequently, Gelco is not bound either. b. The underlying agreement is enforceable because it is a requirements contract