Most everyday purchases at the store are labeled with the price of the item before sales tax. Which expression could be used to find the amount of tax? Amount of Tax = Original Price + Total Cost
Amount of Tax = (Total Cost)(Original Price)
Amount of Tax = (Original Cost)(Tax %)
Amount of Tax = (Total Cost)(Tax %)

I already know the answer im just testing you guys!

First answer i will mark brainlist!(sorry if i spelled anything wrong)