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Assuming a 90 year spell includes 22 leap years, the number of days is equal to (68 x 365) + (22 x 366) = 24820 + 8052 = 32872 days. If the 90 year spell includes 23 leap years, the number of days is equal to (67 x 365) + (23 x 366) = 24455 + 8418 = 32873 days. 3 people found this useful.
26 PAYPERIODS TIMES 14 DAYS IN A BIWEEKLY PAY PERIOD=364 DAYS. 365 DAYS IN A YEAR - 364 PAID DAYS A YEAR=1 DAY LEFTOVER. 11 years x 1 day left over= 11 days. 2 leap years in those 11 years= 2 extra days.