class a makes 1100 in profit from its first salsa class and increases by 15% each month. how much do they make I. the 8 and 9 months. class b makes 4000 from its first class and increases by 1100 per class till 3 more classes. how much will they make by then and how many classes in total does class b need to pass 30 grand. up to what month is class b profit < class a profit