.. In 1799, it would cost so much to mail a letter-- I don't know exactly, something like $10 or $20 to mail a letter at today's rate-- and it would take a long time get there.

在1799年，寄封信需要花费-,我也不清楚具体的数字,大概相当于现在的10到20块钱-,而且还要花很久才能送达。

耶鲁公开课 - 金融市场课程节选

The good news is that there are several employee benefits you can offer that don't cost much or anything at all.

WSJ: Offering Perks That Lure Top Talent

First, publishers make more money on hardcover sales than e-book sales, thanks to the inconvenient and widely unknown fact that digital books don't cost much less to produce than physical ones.

ENGADGET: Editorial: Bring on the digital overthrow of publishing

House brands offer retailers a better profit margin, since they don't cost as much to market as national brands.

FORBES: Profit in a big orange box