The weekly extended benefit amount payable to an individual for a week of total unemployment in his or her eligibility period shall be an amount equal to the weekly benefit amount payable to him or her during his or her applicable benefit year. However, for those individuals whose eligibility period for extended benefits commences with weeks beginning after October 1, 1983, the weekly benefit amount, as computed in RCW
50.20.120(2) and payable under this section, if not a multiple of one dollar, shall be reduced to the next lower multiple of one dollar.