You will be given a definition of a task first, then some input of the task.
Given a text, write a compressed version of it in a single sentence.

Rates based on numerals could result, even though there would be transaction costs. Such a system, however, might not be the most desirable, one downside being that the smallest single-piece mailers could default to a rate that is high enough to cover all destinations.
Output:
There would be transaction costs. Such a system, however, might not be the most desirable, one downside being that the smallest mailers could default.