Regarding the course duration of Masters in Data Science and Analytics in Georgia State University.

I got admit for Masters in Data Science and Analytics in Georgia State University for fall 2022 intake. I actually want to know the exact course duration period as when i searched through official university websites and other websites I got to know that the duration of course is for 12 months (3 semester course) and 30 credits But in my I-20 the duration of course ( start date aug 2022 to end date dec 2024) And please can I know the duration of course exactly for fall 2022 term and the estimated tution cost is 33k dollars for 12 months in my I-20. Is 33k dollars for whole course or just for 2 semesters How much will it cost for each credit?