Taking summer college cles?

It would be fine, just as long as you don't get burned out and can keep up. It might depend on where the other cles fall too. If you're only two or three cles per session, it probably wouldn't be too terrible. If you can, I would also spread out the harder cles over the two sessions; only take accounting during one session, and economics during the other. They can both be strenuous, so if you're looking to take more cles, it'd be better to take some easier ones with the harder ones.