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 550 tablets during December. However, due to LCD defects, the company actually used Soo LCD displays duting December. Each display has a standard cost of $6,40. LCD displays were purchased for December production at a cost of $2,950. Determine the price variance, quantity variance, and total direct materials cost variance for December. Enter a favorable variance as a negative number using a minus. sign and an unfavorable variance as a positive number. And, enter your final variance amount to the nearest whole dollar