每吨矿砂的净利达20美元。

The net profit amounts to 20 dollars per ton of ore.

运费最多不可超过每吨2，500元，相信贵方必能提供更为优厚的条件。

The freight shall not exceed$2,500 per ton at most, but we trust you will succeed in get easier term.

每吨矿石的净利为二十美元。

The net profit amounts to twenty dollars per ton of ore.