4. extended response: 10 point rubric. show all work. calculator allowed, but be sure to show the work. find the final cost of a playstation 4 which has a regular price of $297.48, but is on sale until the 4 of july for 15% off. you also get a discount of an additional 10% off because you said you are a student of mrs. vanostrand. the sales tax rate in allegheny county where you are purchasing it is 7 44%. find the lowest sale price, the sales tax, and the total cost. (where necessary, round to the nearest cent). show work: (5 points for work)