Struggling with this question

Preble Company manufactures one product. Its variable manufacturing overhead is applied to production based on direct labor-hours and its standard cost card per unit is as follows: The planning budget for March was based on producing and selling 24,000 units. However, during March the company actually produced and sold 30,600 units and incurred the following costs: a. Purchased 170,000 pounds of raw materials at a cost of $9.00 per pound. All of this material was used in production. b. Direct laborers worked 68,000 hours at a rate of $18 per hour. c. Total variable manufacturing overhead for the month was $512,040. What is the labor spending variance for March? (Indicate the e unfavorable, and "None" for no effect (i.e., zero variance.). Input What variable manufacturing overhead cost would be included in the company's planning budget for March? What variable manufacturing overhead cost would be included in the company's flexible budget for March? 4. What is the variable overhead rate variance for March? (Round the actual f each variance by selecting " F " for favorable, " U " for unfavorable, and " N amounts as positive values.) What is the variable overhead efficiency variance for March? (Round the ect of each variance by selecting "F" for favorable, " U " for unfavorable, lounts as positive values.)