Lizzie Gunderson is trying to establish a credit history and has a Visa charge card. She received a September 3 statement that shows a balance of $254.80 from the previous month. The statement shows the following transactions: payment on September 12 of $50, charge on September 15 of $35.18, charge on September 20 of $120, and a final charge on October 2 of $14.60. Calculate the average daily balance for September.