The following is the financial information for Chen Co. for 2015: September 30th October 31" Cash 7,800 6,800 Accounts Receivable 12,800 15,800 Chen Co. always makes credit sales at first and then customers pay off their accounts. The firm's expenses and costs are paid in cash and never put on account. So the Cash account is only related to payments received from customers and payments for expenses and costs. Cash paid for expenses and costs in October is $68,000. Use the above information to find the amount of Sales Revenue for October. a. $70,000 b. $4,000 C. 2,000 d. 14,000