Compute the total commission for the following commission payment plans.

	Graduated Commission Rates	Sales	Commission
a.	3% on sales to $25,000 5% from $25,000 to $50,000 7% on sales above $50,000	$84,000	$
b.	3.5% on sales to $50,000 4% from $50,000 to $100,000 5.5% on sales above $100,000	$114,000	$
c.	1% on sales to $100,000 1.5% from $100,000 to $200,000 2% on sales above $200,000	$274,000	$