Vendor: Can I help you ?
Parent: Yes, how much are the carrots？
Vendor: They are one dollar a kilo
Parent: OK. I’d like half a kilo, please .
Vendor: Do you want anything else?
Parent: No, that’s it, thanks.

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Vendor: What can I do for you ?
Parent: Mmm, these tomatoes look good.
Vendor: Yes ,they are very really fresh. 
Parent: How much do they cost?
Vendor: They’re 2 dollars 60 cents a kilo.
Parent: Mmm, I’d like four,please.
Vendor:OK, Let’s see. 2 dollars 60 cents a kilo. That’s 40 cents,please
Parent: OK. Thank you.
Vendor: And here is your change.