can someone explain this with details please

ACCRUED SALARIES AND WAGES Illustration: Yazici paid salaries and wages on October 26; the next payment of salaries will not occur until November 9. The employees receive total salaries of $2,000 for a five-day work week, or 400 per day. Thus, accrued salaries at October 31 are $1,200 (400 x 3 days). Hlustration 3-19 Calendar showing Yazici's pay periods 10 October S M Tu W Th F S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 November S M Tu W Th F 1 2 4 5 6 7 8 .9 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Start of pay period Now Adjustment period Payday Payday 3-52 LO6 MacBook Pro