Time and Materials If this contract is designated as a Time and Materials contract, invoicing and payment shall be as follows: (a) Consultant shall submit invoices, not more often than once a month during the term of this agreement, based on the cost for work performed in accordance with the Rate Schedule in the Scope of Work and authorized reimbursable expenses incurred prior to the invoice date. Invoices shall contain the following information: (i) Serial identifications of bills, i.e., Xxxx No. 1; (ii) The beginning and ending dates of the billing period; (iii) A summary containing the total contract amount, the amount of prior xxxxxxxx, the total due this period, percentage of work completed, the remaining balance available for all remaining billing periods, and a brief description of work completed during the billing period. (b) City shall make monthly payments, based on such invoices, for satisfactory progress in completion of the Scope of Work, and for authorized reimbursable expenses incurred.