Listen and read.
Shop assistant: Good morning. Can I help you?
Customer: Oh, yes, please. I need a new charger for my mobile phone.
Shop assistant: Come this way, please. All the chargers are over here.
Customer: I like this one. How much is it?
Shop assistant: This one is twenty-two pounds and forty-nine pence.
Customer: Here tou are. Ten... twenty... twenty-five pounds and fifty pence.
Shop assistant: Here's your change and your receipt. Thank you.
Customer: Thank you very much for your help. Goodbye.
Task:
Answer in this forum with the recording of your voice playing the shop assistant or the customer part.
To do so, click on 
and then clic on Avançat as in the picture
Then, click on the microphone icon 
as in the picture
Then a new window appears
Click on Inicia l'enregistrament and Do the role play the best as you can.
When you finish click on Adjunta l'enregistrament as in the picture.
Si no tens micro, pots enregistrar-ho des del teu mòbil o tablet i enviar-ho com a fitxer adjunt.