Kevin owns an upscale restaurant, and tonight is one of the busiest nights of the year. Kevin asks Naomi to help with the valet service at the restaurant by parking cars. At the end of the night, Naomi requests payment from Kevin for her services. Kevin balks at paying Naomi because he thought Naomi was just doing him a favor. Because Naomi parked cars for Kevin at Kevin's request: Kevin is not required to pay Naomi for her services because she was just doing a favor for him. Kevin is required to pay Naomi whatever price she sets. Kevin must pay Naomi the customary compensation for such services. Kevin is not required to pay Naomi for her services because they had not agreed on a price