Answer:
a: (purchase price) x (percent sales tax); then added to original amount
.
Step-by-step explanation:
The total price including sales tax is always calculated by adding the sales tax to the original price.
Example:
A book costs $100 with a sales tax of 10%.
The price of the book without sales tax is just $100.
We then compute for the sales tax by multiplying the original price to the sales tax percentage.
100 x 10% or 0.1 = $10.
The sales tax will be 10.
Then we add the sales tax with the original price of $100.
$100 + $10 = $110 Total price after sales tax.
