7.(1.5 points) Annalee 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...... Actual level of activity ...... Cost formula for variable overhead cost. Budgeted fixed manufacturing overhead cost............... Actual total variable overhead ................ Actual total fixed manufacturing overhead. ................. 6,100 MHs 6,300 MHs $6.70 per MH $42,000 $41,580 $45,000 What was the variable overhead rate variance for the month? A. $710 unfavorable B. $1,340 unfavorable C. $630 favorable D. $3,000 unfavorable