Integrated, Inc., entered into a contract with the state of California to construct a building. It then subcontracted the electrical work to Alec Fergusson Electrical Contractors. The subcontract was a printed form with blanks filled in by typewriting. The printed payment clause required Integrated to pay Fergusson on the 15th day of the month following the submission of invoices by Fergusson. The typewritten part of the contract required Integrated to pay Fergusson “immediately following payment” (by the state) to the general contractor. When was payment required? [Integrated, Inc. v Alec Fergusson Electrical Contractors, 58 Cal Rptr 503 (Cal App)]