请教高手翻译成外贸英文

Would you please send the drawings to us when the design is finished? The samples are availabe, with a sampling fee of USD 200, which will be returned to you if you place a single order over USD 3000 in the future. Quantity of samples: 20 pcs each type. Leadtime for samples: about 7 days

May you send the design to me if you have finished it?
We can make sample for you and the cost is USD200.
We can give the money back if the value of one single order reaches USD3000.
Sample qty: 20pcs.
Time needed to make sample: 7 days.

Would you please send me the drawings when the design is finished? We can make the samples for you with a reasonable fee of 200 dollars. And we can return your sample fee if the total amount of your order is up to 3000 dollars at a time.
Quantity of samples:20 pieces per style.
Time needed:7 days or so

Could you send me the pattern if you finished it?We could draw a design for you.The payment of sampling is USD 20