The following information is available for the Gabriel Products Company for the month of July:

	Static Budget	Actual
Units	5,000	5,100
Sales revenue	$60,000	$58,650
Variable manufacturing costs	$15,000	$16,320
Fixed manufacturing costs	$18,000	$17,000
Variable marketing and administrative expense	$10,000	$10,500
Fixed marketing and administrative expense	$12,000	$11,000

The total sales-volume variance for the month of July would be:

a. $2,550 unfavorable.

b. $1,350 unfavorable.

c. $700 favorable.

d. $100 favorable.