CMU vs Berkeley for Applied Math and Economics

I got accepted into CMU (B.S. in Economics and Mathematical Sciences)and Berkeley (Applied Mathematics) for undergrad and I’m having a hard time choosing between the 2. I am interested in majoring in applied math, data science and Econ(together) and plan on eventually doing MBA.I have heard that Berkeley has the better math program overall but not economics and the huge class sizes worry me… So what should I do? Any advice would be highly appreciated!
I also got Accepted from UCLA, UCS, UW, RICE

can you afford CMU? is it a LOT more expensive than UCB / UCLA?

yes I can, but does it make sense?