Answer: see the explanation
Explanation:
Add the price of the item and the tax on the item, or just multiply the price of the item by the tax rate plus 1 (to include the price of the item)
Let's say the cost of an item is
100 dollars and the tax rate is 5% or 0.05. To get the amount of tax that has to be paid on
the $100 item, multiply 100 by 0.05 to get 5 .
Add the amount of the tax ( $5 ) to the price of the item ( $100) to get a total cost of $100.
Or you could multiply 100 by 1+0.05 or 1.05 to get the same answer. The reason why the
1 can be added in is because the total cost includes the price of the item, not just the sales tax on it.