I think this math is off, as it assumes a single semester lasts a full year. For a full year you would need to pay for multiple semesters of tuition, probably 3 at most universities to cover the summer.
Annual insurance fee is already calculated annually.
Source: I'm a Portland State alumnus.
I'll include this when I build out v2.
The exception is when summer is the first time you attend and you want to start insurance before fall. Then you need to meet minimum hour requirements.
I'd guess most schools are similar because otherwise they'd practically force every student to take summer classes. But it's good to verify.
I did the math with Auburn University and it's definitely off. Unless that school allows an entire semester to last a year? (1 credit hours * $430 per credit) + $2028 insurance cost / 12 = $204. I think it would be 2 credit hours, so: (2 credit hours * $430 per credit) + $2028 insurance cost / 12 = $240
Now the tuition is doubled.
The insurance premium stays the same though because that's already the annual rate.