Riverside Bookstore ordered 1,200 copies of an introductory statistics textbook from Prentice Hall on July 17, 20X0. The books were delivered on August 12, at which time a bill was sent requesting payment of $80 per book. However, a 6% discount was allowed if Prentice Hall received payment by September 12. Riverside Bookstore sent the proper payment, which was received by Prentice Hall on September 10. On December 18, Riverside Bookstore returned 80 books to Prentice Hall for a full cash refund. Requirement 1. Prepare the journal entries (if any) for Prentice Hall on (a) July 17. (6) August 12. (.) September 10, and (d) December 18. Include appropriate explanations. Assume that Prentice Hall uses the gross method for cash discounts. (Record debits first then credits. Select explanations on the last line of the journal entry table, make sure to select "No entry required" in the first cell in the "Accounts" column and leave all other cells blank.) (a) Order placed, July 17. Date Accounts Debit Credit Aug 12 (b) Books delivered, August 12. Date Accounts Debit Credit Aug 12 (c) Payment received, September 10. Date Accounts Debit Credit Sep 10 (d) Books returned, December 18. Date Accounts Debit Credit Dec 18 Requirement 2. Suppose this was the only sales transaction in 20X0. Prepare the revenue section of Prentice Hall's income statement. (Leave unused cells blank.) Deduct: Net sales