Excess Usage If during a Billing Period, In Energy is greater than zero (0), then Excess Usage for that Billing Period will be calculated. If Excess Usage is greater than zero (0), then for the Facility and any secondary account at the conclusion of that Billing Period: (i) kilowatt-hour usage will equal the value of Excess Usage and (ii) Unused Credits are equal to zero (0). If Excess Usage is equal to zero (0), then for the Facility and secondary accounts at the conclusion of that Billing Period: (i) kilowatt-hour usage is equal to zero (0) and (ii) Unused Credits are reduced by the value of In Energy, determined for that Billing Period, and that reduced value, in accordance with paragraph (C) Unused Credits of this Article IV, will remain for possible future application.