The following is monthly budgeted cost and activity information for the four activity centers in the billing department of Oregon Power Company: Variable Fixed Cost Driver $80,886 $164,000 3,400 labor hours $9,720 $29,000 2,700 letters $178,500 $76,000 2,550,000 lines $11,210 $77,000 19,000 accounts In September, actual costs and activity were as follows: Total Costs Driver Amount $246,552 3,470 labor hours $38,592 2,860 letters $267,241 2,740,000 lines $89,068 19,050 accounts Required Compute the flexible-budget variances for the following two activity cost items (round all answers to the nearest dollar and enter favorable variances as positive numbers and unfavorable variances as negative numbers): Correspondence Account inquiry Solution Activity Center Variable(A) Fixed(B) Cost Driver .