Sum is a newly, quite famous Bin Weevil. She just became famous, cause she counted all of Dosh's mulch! As Dosh had so many mulch, Sum used her calculator to help her. If you need help with numbers and adding up, Sum is the one to help you! As of February 2nd, 2012, she had a makeover and a new appearance along with Figg!
Here is her biography: