2. Silicone Engine Inc. produces wrist-worn tablet computers. The company uses Thin Film Crystal (TFC) LCD displays for its products. Each tablet uses one display. The company produced 580 tablets during December. However, due to LCD defects, the company actually used 600 LCD displays during December. Each display has a standard cost of $15.00. Six hundred LCD displays were purchased for December production at a cost of $8,550. For December determine the a. price variance, b. quantity variance, and c. total direct materials cost variance