Can you please explain how to solve these?

Dermody Snow Removal's cost formula for its vehicle operating cost is $2,950 per month plus $325 per snow-day. For the month of December. the company planned for activity of19 snow-days, but the actual level of activity was 17 snow-days. The actual vehicle operating cost for the month was $9,410. The spending variance for vehicle operating cost in December would be closest to: Multiple Choice 0 $285 U $285 F $935 U 000 $935 F Dermody Snow Removal's cost formula for its vehicle operating cost is $2,950 per month plus $325 per snow-day. For the month of December, the company planned for activity of 19 snow-days, but the actual level of activity was 17 snow-days. The actual vehicle operating cost for the month was $9,410. The spending variance for vehicle operating cost in December would be closest to: Multiple Choice 0 $285 U $285 F $935 U $935 F OOO A total of 6,850 kilograms of a raw material was purchased at a total cost of $21,920. The materials price variance was $1,370 favorable. The standard price per kilogram for the raw material must be: Multiple Choice O $0.20 O $3.00 O $3.20 O $3.40Milar Corporation makes a product with the following standard costs: Standard Quantity Standard Price or or Hours Rate Direct materials 13.5 pounds $13.00 per pound Direct labor 0.8 hours $39.00 per hour Variable overhead 0.8 hours $18.50 per hour In January the company produced 3,500 units using 14,000 pounds of the direct material and 2,920 direct labor-hours. During the month, the company purchased 16,900 pounds of the direct material at a cost of $14,760. The actual direct labor cost was $113,461 and the actual variable overhead cost was $51,828. The company applies variable overhead on the basis of direct labor-hours. The direct materials purchases variance is computed when the materials are purchased. The labor rate variance for January is: Cabell Products is a division of a major corporation. Last year the division had total sales of $21,720,000, net operating income of $1,346,640, and average operating assets of $4,778,400. The company's minimum required rate of return is 15%. The division's margin is closest to: Multiple Choice 0 6.2% 28.2% O O 41.3% O 22.0%