For our flight home to New York the following day, we were presented with only one challenge involving the empty operating weight (EOW) of the airplane. The EOW includes the actual weight of the 777, the weight of all crewmembers plus their bags, catering equipment, cargo containers, cabin equipment, residual fuel, engine oil, potable water and chemical fluids. A discrepancy existed between the planned EOW and the final takeoff close-out EOW. After a check of our performance manual, also on the iPad, it was found that the load agent can adjust the weight for operating items that are heavier or lighter than standard. Discrepancy solved.