the answer is a because the +2 is the why intercept.
Below is how you insert a picture
Unit price = price / quantity
1.20 / 20 = 0.06 per ounce
0.85 / 12 = 0.071 per ounce
The better deal is the 20 oz for $1.20
90+90+90+90 is 360
Therefore, the interior angle sum of a rectangle is 360 degrees