the selling price of an item is 440$ it is marked down by 20 percent but this sale price is still marked up from the cost 320$ find the mark up from the cost to sale price

You find a mysterious, dull substance on the ground and pick it up for a closer look. it is powdery, very light, and soft to the touch. the substance is most likely i. an organic mineral ii. a metallic mineral iii. a nonmetallic mineral i only ii only iii only i and ii i and iii