(Gary and Jane are in the market shopping for food...)
Jane: The mushrooms look nice. We can buy some for soup. 
Gary: That's great! I like mushroom soup very much. 
Vendor: Can I help you, madam? 
Jane: Yes, How much do these mushrooms cost? 
Vendor: About 4 dollars a kilo. 
Jane: Oh, that is too expensive. 
Vendor: The price of the mushroom has risen since last weekend. 
Gary: Then we want half a kilo. 
Vendor: Ok, here you are. Do you want anything else?
Jane: We need some peppers. My mother loves Malay food. Do you have any good ones? 
Vendor: Yes, what about these ones? They are good and cheap. Only 60 cents a kilo. 
Jane: Good, I'd like one kilo. How do these cost? 
Vendor: Let's see. 2 dollar and 60 cents is 2.6 dollar in all. 
Jane: Ok. Thank you. 
Vendor: Here is your change.