这封英文信如何写？

Dear Sir or Madam:
Thank you for your order.
After studied it carefully ,we very much regard to inform you that the quantity of your order has been found too small to be acceptable .Because there is a heavy demand for the goods ,we are pressed for timely delivery now .Besides the cost of production is incresing ,we can't benefit a cent from the small order.
but if you can received a much higher price ,we might come to terms.
we hope you will consider it ,and looking forward your early reply.
Yours faithfully,
XXXX

就说你们的货很俏，正忙于处理许多大订单，而且现在产品技术更新，成本提高，对于他这种小额订单，如果按照之前的价格算是没有利润的，提高单价看他们能不能接受了，或者建议对方加大数量，这样才好发货。
一定要决心停止发展吗？现在客户不好找哦，你先把原因讲清楚了，看看对方的反应再说，只要不亏本就可以做的，不能放弃任何一个客户，也许他会给你带来潜在商机。

Due to the customer's order is not enough, our boss decided to stop cooperating with this company.

Dear Customer,
It has been our great pleasure to work with you. Recently, we noticed that your ordered less products from us tha