The following data have been provided by Mathews Corporation: Budgeted production. Standard machine-hours per unit ..... Standard lubricants rate Standard supplies rate........... 6.900 units 9.4 machine-hours $1.20 per machine-hour $1.00 per machine-hour Actual production... Actual machine-hours (total)......... Actual lubricants cost (total)....... Actual supplies cost (total).......... 7.000 units 66.230 machine-hours $78,100 $66,536 Lubricants and supplies are both elements of variable manufacturing overhead. The variable overhead rate variance for lubricants is closest to: $1,376 U $516 U $860 F $1,376 F