$ 1300 monthly ==> annual salary = 1300*12 = $ 15,600
$ 1000 biweekly
biweekly means every two weeks, this results in 26 payments per year
==> annual salary 1000 * 26 = $ 26000
$ 550 weekly ==> 550 * 52 = $ 28600
$ 800 semimonthly ==> $ 800 twice per month ==> 800*2*12= $ 19,200