Some guideance and questions

[Ideas]

Didn't you @Ideas look into that as an option; although I think you opted for the ASNSM in Computer Science. Did statistics fill one of the slots?
Edit:  If Statistics fills 3 credits, SL offers General Calculus I & General Calculus II (although currently scheduled to expire 05/30/18), that would leave 6 credits left of advanced math.  I'm sure the math gurus here could guide you where to get them "quick and cheap", or you could always opt for a summer session of CC (online or local).

At the last minute, I was trying to get a Math concentration instead of CS. However, I believe that they made the Math concentration harder after Jan 1st, and the unofficial evaluation was completely inaccurate for me. The unofficial evaluation made it seem like I could take 1-2 courses and complete it. Once I had them add it officially, I could see it was much harder to fulfill the requirements. I believe my posts are at end of my TESU Journey thread. I don't recall things like this for long, once I decide the degree is off the table for me.

However, difficulty is relative. If someone already has Linear Algebra, Calc III, etc then they would find this easy. I found that even if I did Calc II, there was no other quick or cheap course I could do to get the last credits.