Legal Invoice monthly totals

Requester: 
Harbaugh, Bill
Initial Request Date: 
12/17/2013

This is a public records request for invoices for all legal or other consulting services related to UO bargaining with UAUO or the UO GTFF, from 6/10/2013 to the present.----------------------Amended 1/21/2014--------------------------------------------------------------how much would it cost for just the monthly totals - not the invoices themselves?