Language Point 16

Collegiate Care, with its "highest quality papers at the lowest possible prices," offers on-file papers for $5.95 per page. (Para. 4)

Meaning: Collegiate Care has stored papers of the "highest quality" in a large group and is ready to offer them "at the lowest possible prices" — $5.95 for each page.

on-file: recorded or kept in a file or in a database of information

His fingerprints are on-file.

他的指纹已经存档了。

This is an on-file case.

这案子档案上有记载。

per: prep. for each

Apples at $1.50 per kilo.

苹果每公斤1.5美元。