311. We are pleased to give you an order for 3,000 computers in current stock at the prices you quoted.

312.We wish to order from you,your products as pro-purchase.

313.We are pleased to place with you an order for 2,000 washing machines to be supply from current stock.

314.We wish to order from you,according to this purchase order.

315.Thank you for your quotation dated May 20th. And this is our official order for 10 palace lanterns.

翻译：
按照你方报价，我们下3000台计算机订单，以备库存。

我们希望按照你们的正式采购订单的产品下单。

我们向贵司下2,000台洗衣机的订单，以备库存

我们按照采购单下订单。

感谢你们5月20日的报价，这是我们10只宫灯的正式订单