Silicone Engine Inc. produced 490 tablets during December. However, due to LCD defects, the company actually used 510 LCD displays during December. Each display has astandard costof $6.80. 510 LCD displays were purchased for December production at a cost of $2,925.

I have to find the price variance, quantity variance, and total direct materials cost variance. My answers were: -540.6, 136, and -404. However, it says that the first and the last are incorrect. Please help.