Calculate revenue for the month of September using the cash basis of accounting. (Do not leave any answer field blank. Enter O for amounts.) 1. Collected $190 cash from customers for services performed in August. 2. Collected $490 cash from customers for services performed in September. 3. Billed customers $610 for services performed in September. 4. Performed $110 of services to customers who paid in advance in August 5. Received $110 from customers in advance for services to be performed in October. Total revenue