Answer:
Activity variance = $858 unfavorable
Step-by-step explanation:
The activity variance occurs as result of the difference between the actual level of work (activity) done and the budgeted level of work as planned.
$
Planned budget (1060 + (429× 11)) = 5,779
Flexible budget (1060 + (429 ×13) = 6,637
Activity variance 858 unfavorable