Millonzi Corporation has a standard cost system in which it applies manufacturing overhead to products on the basis of standard machine-hours (MHs). The company has provided the following data for the most recent month:

Budgeted level of activity	3,600	MHs
Actual level of activity	3,500	MHs
Standard variable manufacturing overhead rate	$6.30	per MH
Actual total variable manufacturing overhead	$21,000

What was the variable overhead rate variance for the month?

	$600 unfavorable
	$630 favorable
	$1,680 favorable
	$1,050 favorable