CompAndSave.com is sponsoring question number 3 today in our Trivia Contest.  Here’s your question; find the answer at CompAndSave.com.

What’s the most critical part of the printer?  Hint.  It’s not the ink cartridge or the paper!

Each correct answer earns an entry into our prize drawing on the 30th.  You could win a $25 store credit at CompAndSave.com.  Answer in the comments section below.