The Storage Services Fee shall be calculated using the per Barrel rate set forth on the Terminal Service Orders executed effective as of the Commencement Date for the then-existing aggregate Shell Capacity of all of the Tanks in the Storage Facility. The Storage Services Fee owed during the Month in which the Commencement Date occurs, if less than a full Month, shall be prorated in accordance with the ratio of (i) the number of days in such Month during which this Agreement is effective to (ii) the total number of days in such Month.