Charlet Company sells office chairs to its customers. On June 10, Charlet purchased 40 office chairs from one of its suppliers, paying $120 per chair. On July 5, Rutherford Corporation purchased 18 of these office chairs from Charlet for a list price of $200 each. Rutherford returned 3 of the chairs on July 7, paid one-half of its bill on July 16 and paid the other one-half of July 29. Charlet offers credit terms of 5/15, n/40 to its customers. Calculate the amount of gross profit Charlet Company earned from its sale to Rutherford Corporation.