During the year, the following selected transactions affecting stockholders' equity occurred for Navajo Corporation: a. February 1: Repurchased 160 shares of the company's common stock at $20 cash per share. b. July 15: Sold 80 of the shares purchased on February 1 for $21 cash per share. c. September 1: Sold 50 of the shares purchased on February 1 for $19 cash per share. Required: 1. Prepare the journal entry required for each of the above transactions. Note: If no entry is required for a transaction/event, select "No journal entry required" in the first account field