Sholette Manufacturing Corporation has a standard cost system in which it applies manufacturing overhead to products on the basis of standard machine-hours (MHs) at $3.00 per MH. During the month, the actual total variable manufacturing overhead was $22,910 and the actual level of activity for the period was 7,900 MHs. What was the variable overhead rate variance for the month?

a. $263 Favorable

b. $263 Unfavorable

c. $790 Unfavorable

d. $790 Favorable