the plaintiff, brenner, entered into a contract with the defendant, little red school house, which stated that in return for a nonrefundable tuition of $$1080,$ brenners son could attend the defndants school for a year. When brenners ex wife refused to enroll their son, the plaintiff sought and received a verbal promise of a refund. The defendant now refuses to refund the plaintiffs money for lack of consideration. did mutual consideration exist between the parties? Explain.