Can I lump together weeks of unreported time in to one week?

Please don't. This opens up the possibility of OT hours which is neither permitted through Federal Work Study nor an accurate representation of your actual hours worked. Instead, send your itemized hours to the Manager of the Federal Work Study Program with a detailed breakdown of your hours worked for each week. Use the following format:

John D. Harvard worked the following hours for week ending __/__/__ (must be a Saturday):

Sun: 2

Tue: 5

Wed: 1.5

Thu: 1.5

Total: 10