Here is my code:
Printing from $10
$("li.det_price a").text()
would get you the text of that LI (and, unfortunately, of all LI nodes with that class reference). To get just the text of that particular LI you would have to give it an ID, or find some other way to identify it uniquely.
Once you do identify it uniquely, you could simply put a string in the .text() braces to change what you had. For example,
$("li.det_price a").text('Not Printing')
would change your text above from 'Printing' to 'Not Printing'.