store A sells a computer for $1,200. The computer is on sale for 15% off. The sales tax is 5.4%. What is the total cost of the computer?

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.