Lisa purchased a hat for $10, a purse for $20, and a book for $23. the sales tax rate was 7.2 percent. what was the total amount she paid?

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.