A: And these tomatoes. How much are they?
B: Ten baht a kilo. They're very fresh. How many kilos do you want?
A: I'll take two kilos. And I'd like a kilo of oranges. How much are they?
B: Five baht a kilo. Would you like anything else?
A: I'd like a kilo of potatoes.
B: That will be eight baht.