Aug. 4Sold merchandise on account to S. Miller for $320 plus sales tax of 4%, with 2/10, n/30 cash discount terms.6Sold merchandise on account to K. Krtek for $210 plus sales tax of 4%.10S. Miller returned merchandise purchased on August 4 for $20 plus sales tax for credit.13S. Miller paid the balance due on her account.15K. Krtek returned merchandise purchased on August 6 for $40 plus sales tax for credit.20K. Krtek paid the balance due on his account