The difference between the selling price of an item and its cost is called The gross margin The net margin The gross mark-down The net operating margin Question 3 (1 point) A purchase discount with terms 2/10, n/15 means 2% discount if paid in 10 days, net amount due in 15 days 10% discount if paid in 2 days, net amount due in 15 days 2% discount if paid in 10 days, nothing due for 15 weeks 10% discount if paid in 2 days, nothing due for 15 weeks