Selected transaction data of a business for September are summarized below. Determine the following amounts for September: (a) total revenue, (b) total expenses, (c) net income. Service sales charged to customers on account during September exist33,000 Cash received from cash customers for services performed in September 28,000 Cash received from customers on account during September: Services performed and charged to customers prior to September 13,000 Services performed and charged to customers during September 18,000 Expenses incurred prior to September and paid during September 6, 500 Expenses incurred and paid in September 36, 250 Expenses incurred in September but not paid in September 5,000 Expenses for supplies used and insurance (not included above) applicable to 2,000 September