Sam bought brushes for $8, a palette for $5, and oil paints for $15. he paid $29.82 in all. what sales tax rate did sam pay? 0.06%

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.