Kate bought a sketch notebook, a box of 12 colored pencils, a package of 15 erasers, and a box of 13 pastel chalk sticks. The package of erasers cost $0.98. The box of pastel chalk sticks cost $5.01. The sales tax rate for all the items is 8%. The amount of sales tax was $1.62. The total cost was $21.87. What is the cost of the sketch notebook? . The box of colored pencils cost $9.01. W What information is not necessary to solve the problem? A the sales tax rate B the cost of the package of 15 erasers I the cost of the box of 12 colored pencils the cost of the box of 13 pastel chalk sticks