kindly please help me with part B and C. thanks

OH variances Nelson Co. manufactures a product that requires 3.5 machine hours per unit. The variable and fixed overhead rates were computed using expected capacity of 345,600 units (produced evenly throughout the year) and expected variable and fixed overhead costs, respectively, of $4,838,400 and $8,467,200. In October, Nelson manufactured 28,560 units using 100,320 machine hours. October variable overhead costs were $396,000; fixed overhead costs were $706,800. a. What are the standard variable and fixed overhead rates? Standard VOH rate $ 4 per MH 7 per MH Standard FOH rate $ b. Compute the variable overhead variances. Note: Do not use a negative sign with your answer. VOH spending variance $ VOH efficiency variance $ Total VOH variance $ 0 0 0 C. Compute the fixed overhead variances. Note: Do not use a negative sign with your answer. FOH spending variance $ FOH volume variance $ 0 0 Total FOH variance $ 0 Please answer all parts of the