PR 8-3A Direct materials, direct labor, and factory overhead cost variance analysis Obj. 3, 4Mackinaw Inc. processes a base chemical into plastic. Standard costs and actual costs for direct materials, direct labor, and factory overhead incurred for the manufacture of 40,000 units of product were as follows: Each unit requires 0.3 hour of direct labor. INSTRUCTIONS Determine (A) the direct materials price variance, direct materials quantity variance, and total direct materials cost variance; (B) the direct labor rate variance, direct labor time variance, and total direct labor cost variance; and (C) the variable factory overhead controllable variance, fixed factory overhead volume variance, and total factory overhead cost variance. Answer: Check Figure: C. Controllable variance, $(4,800)F