Sheryl Crow Equipment Company sold 500 Rollomatics during 2007 at $6,000 each. During 2007, Crow spent $20,000 servicing the 2-year warranties that accompany the Rollomatic. All applicable transactions are on a cash basis. Instructions (a) Prepare 2007 entries for Crow using the expense warranty approach. Assume that Crow estimates the total cost of servicing the warranties will be $120,000 for 2 years. (b) Prepare 2007 entries for Crow assuming that the warranties are not an integral part of the sale. Assume that of the sales total, $150,000 relates to sales of warranty contracts. Crow estimates the total cost of servicing the warranties will be $120,000 for 2 years. Estimate revenues earned on the basis of costs incurred and estimated costs.