BM Inc. has established standards as follows: 00 Inputs Standard Quantity or Hous Direct Materials 6.6 Kilos 03hours Direct Labor 0.8 hours Variable Overhead The company produced 6,000 units in May using 3970 disc direct labor-hours. During the month, the company pucat material at $4.70 per kilo. The actual direct laborates variable overhead rate was $2.70 per hour. The company applies variable overhead on the basis die materials purchases variance is computed when the Peguired Calculate a. Material Price Variance b. Material Quantity Variance C. Labor Rate Variance d. Labor Efficiency Variance e. Variable Overhead Rate Variance f. Variable Overhead Efficiency Variance