A.
Store A has sold the most wristbands
The answer is 57 because using remote angles theorem you get the largest angle equals to 66 degrees but you are not done yet you have to subtract 66 from 180 because of sum of angles in a triangle so you get 114 degrees and since you have an isosceles triangle you have to divide by two to get y so y = 57 degrees
2+6+18+54+162+486+1458+4375=6561
you multiply the previous number by three to find the next value
See the attached picture.