Blindleia Care Corporation had the following selected transactions in September:

1. Collected $200 cash from customers for services provided in August.

2. Collected $500 cash from customers for services provided in September.

3. Billed customers $600 for services provided in September.

4. Provided $100 services to customers who paid in advance in August.

5. Received $100 from customers in advance for services to be provided 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.