I'll walk you through the steps, first you find the discount--- 4.3 * .4 = 1.72 Subtract discount from original price---4.30 - 1.72 = 2.58 2.58 is now the sale price after the discount. Now to add tax we must multiply---00.6 * 2.58 = .1548 Add sales to tax price---2.58 + 0.15 = 2.73 So the sale price including tax and the discount will be $2.78 Hope this isn't too confusing and hope it helps