those three questions pls

Question 16 (0.5 points) Listen a 4/15 n 21 means you get a 21% discount if paid with 15 days otherwise the full amount is due within 4 days. True False Question 17 (0.5 points) Listen In a sales return, the buyer returns the inventory to the seller. In a sales allowance, the buyer keeps the inventory and is given a discount by the seller. on 15 Unsaved True False Question 18 (0.5 points) Listen The perpetual system is likened to the Jetsons cartoon because it is automated and updated in real time. True False