4. Samantha bought a shirt for . It there
   sales tax how much sales tax did she
   pay? Watch your rounding!

Samantha’s shirt cost , and the sales tax is calculated as follows: . So, she paid in sales tax. Don’t forget to check your math; rounding can easily lead to minor mistakes, especially if you’re calculating discounts or taxes on bigger purchases!

In real-world shopping, understanding how sales tax is calculated can save you from unexpected costs! Next time you’re at a store, you can quickly estimate the total price by multiplying the item cost by the tax rate, and then just adding that to your original price. It’s a handy skill to have!