; or (B) has been totally separated from employment with the company in a subdivision of which such adversely affected employment exists. (3) The term average weekly wage means one-thirteenth of the total wages paid to an individual in the high quarter. For purposes of this computation, the high quarter shall be that quarter in which the individual’s total wages were highest among the first 4 of the last 5 completed calendar quarters immediately before the quarter in which occurs the week with respect to which the computation is made. Such week shall be the week in which total separation occurred, or, in cases where partial separation is claimed, an appropriate week, as defined in regulations prescribed by the Secretary. (4) The term average weekly hours means the average hours worked by the individual (excluding overtime) in the employment from which he has been or claims to have been separated in the 52 weeks (excluding weeks during which the individual was sick or on vacation) preceding the week specified in the last sentence of paragraph (3). (5) The term benefit period means, with respect to an individual— (A) the benefit year and any ensuing period, as determined under applicable State law, during which the individual is eligible for regular compensation, additional compensation, or extended compensation