M : Good morning! How can I help you? W : Hi, I need some masks and hand sanitizer. M : There are many types of masks. Do you want anything in particular? W : Is there a mask that makes it easier to breathe? M : These are the best. They’re a little expensive, though. W : How much are they? M : Two dollars for one, but if you buy 10, you can get a 10 percent discount. W : Then I’ll buy 10. What hand sanitizer do you recommend? M : I recommend this brand. This one is effective for preventing infectionsand helps to keep your hands moisturized at the same time. W : Good. I’ll take it. M : There are two sizes. The big one is 25 dollars, and the small one is 12dollars. W : The small one, please. Here’s my credit card.