Early in 2020, Sheridan Equipment Company sold 600 Rollomatics at $5,800 each. During 2020, Sheridan spent $21,000 servicing the 2-year assurance warranties that accompany the Rollomatic. All sales transactions are on a cash basis. Prepare 2020 entries for Sheridan. Assume that Sheridan estimates the total cost of servicing the warranties in the second year will be $36,000. (If no entry is required, select "No Entry" for the account titles and enter Ofor the amounts. Credit account titles are automatically indented when amount is entered. Do not indent manually. Record journal entries in the order presented in the problem.) Date Account Titles and Explanation Debit Credit