Question

Find the semi monthly salary when the weekly salary is $1,200

Answer 1

Semi-monthly means twice every month, typically either on the 1st and 15th,
or on the 15th and last.

Months don't line up with weeks in any regular way.   Depending on the
company, if they say "bi-monthly", they may pay 24 times a year, or else
26 times a year.

If they pay every 2 weeks, the semi-monthly is $2400.