Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

If you add all those numbers you'd get 61.43.
6% of 61.43=?
61.43x .06= 3.6858 (6%)
61.43+3.6858= 65.1158

the tax amount was $3.6858
the total was 65.1158, round it and you get $65.12