Shown here is an income statement in the traditional format for a firm with a sales volume of 20,000 units:

Revenues	$	160,000
Cost of goods sold ($16,000 + $3.20/unit)		80,000
Gross profit	$	80,000
Operating expenses:
Selling ($4,500 + $1.40/unit)		32,500
Administration ($7,500 + $1.00/unit)		27,500
Operating income	$	20,000

Requirement 1:

Prepare an income statement in the contribution margin format. (Omit the "$" sign in your response.)

		$
Variable expenses:
	$
Total variable expenses
Contribution margin		$
Fixed expenses:
	$
Total fixed expenses
		$

Requirement 2:

Calculate the contribution margin per unit and the contribution margin ratio. (Round your answers to 1 decimal place. Omit the "$" and "%" signs in your response.)

Contribution margin per unit	$
Contribution margin ratio	%

Requirement 3:
(a)	Calculate the firm's operating income (or loss) if the volume changed from 20,000 units to 25,000 units. (Input the amount as positive value. Omit the "$" sign in your response.)

operating income

$

(b)	Calculate the firm's operating income (or loss) if the volume changed from 20,000 units to 11,000 units. (Input the amount as positive value. Omit the "$" sign in your response.)

operating loss

$

Requirement 4:
Refer to your answer to requirement 1 when total revenues were $160,000.
(a)	Calculate the firm's operating income (or loss) if unit selling price and variable expenses do not change, and total revenues increase by $18,000. (Input the amount as positive value. Omit the "$" sign in your response.)

operating income

$

(b)	Calculate the firm's operating income (or loss) if unit selling price and variable expenses do not change, and total revenues decrease by $12,000. (Input the amount as positive value. Omit the "$" sign in your response.)

operating income

$