definiens: shall mean, with respect to any Applicable Currency, for the period commencing on the Effective Date and ending on the last day of the first Agreement Year the daily average of the exchange rate between such Applicable Currency and the US Dollar for the thirty ( 30 ) days prior to the Effective Date as published in ~ ~ Strm Journal ( or . ifIill : Wall ~ Journal shall no longer p'ublish such exchange rates . as determined by a method that is mutually agreed upon in writing by the parties ) . For each Agreement Year thereafter . the Annual Effective Exchange Rate shall equa£ne - half of the percentage change _ 7l " " Exchange Rate for the prior twelve monthS ] The Average Exchange Rate for a twelve month period shall mean the daily average of the exchange rate between such Applicable Currency and the US Dollar for such period using the average month - end rates of exchange for the such period as published in Iill : Wall ~ Journal ( or if Iill : ~ ~ Joyrnal shall no longer publish such exchange rates . as determined by a method that is mutually agreed upon in writing by the panies )