BE4-2 Blindleia Care Corporation had the following selected transactions in September: 1. Collected $200 cash from customers for services performed in August. 2. Collected $500 cash from customers for services performed in September. 3. Billed customers $600 for services performed in September. 4. Performed $100 of services to customers who paid in advance in August. 5. Received $100 from customers in advance for services to be performed in October. (a) Calculate revenue for the month of September using the accrual basis of accounting. (b) Calculate revenue for the month of September using the cash basis of accounting