我把样品寄给你，请查收。

I mailed the sample to you. Please check the mail for it.

如寄样品，并报最低价格及现汇付款最大折扣，则不胜感激。

I shall be glad if you will send me pattern with your lowest price and best discount for cash.

您若能寄样品，并附上最低价格和付现款的最高折扣率，则非常感谢。

I shall be glad if you will send me patterns with your lowest prices and best discount for cash.