Cosc - dual concetration with GRE some guidance requiered

Hey guys, new member here.
I'm a nonUS national considering a Bs with concetration in chemistry and CS at Cosc.

Currently I'm in the planning stage but my lack of familiarity with US College system is hampering my progress. As far as I have understood GRE-s in chemistry and CS would both net me 48 points 18 of which would be upper level which if there's no overlap means that I would need another 18 points at that level plus the GE requierements.

If anybody has experience with a simmilar situation please chime in.
Also are online labs admissible in your experience?

 

I am not the resident expert on this sort of thing but I can point you to our forum on credit by testing, etc. I'm sure others will add more info

https://www.degreeinfo.com/index.php?forums/clep-dantes-and-other-exams-for-credit.15/