Math 1A and Math 1B simultaneously as a freshman?

<p>I learnt intensive calculus in High School but didn’t take the AP exams so I’m kinda chill about 1A. It’s the combined workload of 1A and 1B that worries me slightly.
As far as the workload goes, I don’t know. In what respect are lab courses tough? I’m prepared to slog but roughly how many hours am I looking at with that course load?</p>