Question 9 Partially correct Mark 0.50 out of 1.00 Prag question Variable Overhead Variances Assume that the best cost driver that Sony has for variable factory overhead in the assembly department is machine hours. During April, the company budgeted 480,000 machine hours and 54,000,000 for its Texas plant's assembly department. The actual variable overhead incurred was 54.180,000, which was related to 500.000 machine hours Do not round until your final answers. Round your answers to the nearest dollar. (a) Determine the variable overhead spending variance. OF (b) Determine the variable overhead efficiency variance Check