Percent Problem: Determine a Cost After a Discount and Sales Tax (7RPA3) This video explains how to determine the cost of an item after a percent discount and sales tax. https://mathispower4u.com #percent, #percentage, #problem, #solving, #increase, #discount sales, #tax, #selling, #price, #cost, #7th, #grade, #common, #core, #math, #maths, #james, #sousa, #equation, #mathispower4u, #7rpa3 | Mathispower4u