June has two businesses. She notices that the break-even point of one of her businesses (Biz A) is a lot higher than the other (Biz Z). She is wondering if that means that Biz Z is a better or safer business than Biz A. She is also wondering if one of the businesses may pay off better than the other if sales of both were to increase significantly. Also, what if they dipped significantly? Give June some insight on this matter.