A: Good morning. Can I help you?
B: Yes, Please. I want to buy calculator.
A: How big is it?
B: It’s pocket-sized. Is it easy to use?
A: Yes, very.
B: What does it do?
A: It gives you calculate mathematical formula quickly.
B: How much does it cost?
A: It cost 1,200 baht. It comes with a one year guarantee.
B: OK. I will take it. I don’t have a cash. Do you take credit cards?
A: No problem! Thank you.