Flexible budgets allow managers to compare actual costs to budgeted costs at different activity levels, rather than comparing actual costs to a static budget for a single planned activity level. Larry, the owner of a lawn care business, prepared a static planning budget for June based on mowing 500 lawns, but he actually mowed 550 lawns. Comparing his actual costs to the static budget revealed unfavorable variances because costs increase with higher activity levels. A flexible budget would have accounted for the higher activity level and shown whether costs were properly controlled as activity increased.