Method for Adjustment. An increase or decrease in the Contract Amount and/or time resulting from a Change in the Work and/or Excusable Event must be determined by one or more of the following methods:
(i) unit prices set forth in this Contract or as subsequently agreed;
(ii) a mutually accepted, itemized lump sum; or
(iii) costs calculated on a basis agreed upon by ConFire and OpTerra Energy Services plus a fee (either a lump sum or a fee based on a percentage of cost) to which the Parties agree.
Method for Adjustment. An increase or decrease in the Contract Amount and/or time resulting from a Change in the Work and/or Excusable Event must be determined by one or more of the following methods at the selection of District:
(i) ENGIE Services U.S.’s costs of subcontractor costs, materials and labor calculated on a basis agreed upon by District and ENGIE Services U.S. plus a fee of fifteen percent (15%).