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.

Figure 2 presents the consumer benefit from delivery scale economies net of inefficiencies which are expressed as a percentage of total postal costs. The top curve incorporates any wage premium the Postal Service may have, the bottom curve nets out Wachter's 29.
Output:
Figure 2 benefit from delivery scale economies which are expressed as a percentage of total postal costs. Top curve incorporates wage premiums the Postal Service may have, the bottom nets out 29.