1. 

Riverbed Co. uses the gross method to record sales made on credit. On June 1,2020 , it made sales of $57,000 with terms 2/15,n/45. On June 12, 2020, Riverbed received full payment for the June 1 sale. Prepare the required journal entries for Riverbed Co. (If no entry is required, select "No Entry" for the account titles and enter O for the amounts. Credit account titles are automatically indented when the amount is entered. Do not indent manually. Record journal entries in the order presented in the problem.)