Taxpayer owns and operates a dance studio. If a client wants to take dancelessons, he must agree to take a minimum of 10 lessons. While the 10 lessonsmust be paid for in advance, the client can schedule each lesson based on hisown schedule.In December Client paid for 10 lessons but was able to take only one before theend of the year. He will take the remaining nine lessons the following year. HasTaxpayer received a prepayment when Client paid for the 10 lessons