ch- Dreighton Engineering Group receives royalties on a technical manual written by two of its engineers and sold to William B. Irving Publishing, Inc Royalties are 10% of net sales, receivable on October 1 for sales in January through June and on April 1 for sales in July through December of the prior year. Sales of the manual began in July 2020, and Dreighton accrued royalty revenue of $31.000 at December 31, 2020, as follows: Receivable-rayalty revenue Royalty revenue 31,600 31,000 Dreighton received royalties of $36,000 on April 1, 2021, and $40,000 on October 1, 2021 Irving indicated to Dreighton on December 31that book sales subject to royalties for the second half of 2021 are expected to be $500,000 Required: 1. & 2. Prepare any necessary journal entry related to royalty revenue for 2021 and record adjustment, if any, made to retained earnings in the 2020 financial statements (If no entry is required for a transaction/event, select "No journal entry required" in the first account field.) Journal entry worksheet Record collection of royalties. Note: Enter debits before credits Date General Journal Debit Credit April 01, 2021 Record entry Clear entry View general journal