Step-by-step explanation:
there are 12 months in a year, and therefore 2×12 = 24 "half-months" and therefore semimonthly payments.
that means each paycheck is
72,000 / 24 = $3,000
there are 52 weeks per year.
that means they're are 52/2 = 26 biweekly periods and therefore payments.
each paycheck is therefore
72,000 / 26 = $2,769.23
so, Alice receives 2 more paychecks (26 to 24) in a year.
the difference between the 2 types of payment is
3000 - 2769.23 = $230.77