Include the volunteer time, it won't hurt and shows that you are involved in more than just school. Jobs-wise, you could say "various retail experience" or something like that. It's pretty crucial to have some work experience, but if you have anything else (internship, etc.) go with that.

The resume that I created is already pretty much full, what can I do if I want to fit this:

EXPERIENCE:
• Private tutoring of high school kids for Algebra, Pre-Calculus and Calculus classes.
• TARGET, Boca Raton, FL                                  August 2011- October 2011
-   Performed tasks such as cashiering, and cleaning of the store.     Developed experience in interacting with customers, worked in     teams in maintaining and organizing different items.
• FOX’s, Boca Raton, FL                                       July 2013-September 2013
-   Organized clothes and kept cabinet organized.

VOLUNTEER WORK:
• Volunteered in the retirement home “Menorah House’ by     preparing lunch, talking and organizing activities for older people.
• Volunteered in the Palm Beach County Library by organizing,     labeling and ordering different books, DVDs and magazines.