Third-grader Amina Banana is back in book three of this chapter book series, navigating new responsibilities at home and growing financial stresses, from National Book Award winner Shifa Safadi. When Amina's family hits hard times, and her dad has been gone working more, she is determined to help her family out. Using her math skills, she develops a new formula. Find a way to make groceries cheaper? + make money (how) + what else? = us being happy From clipping coupons to selling zaatar sandwiches and more—will her formula to make money work?