You will encounter various bitizens that will apply for a job every time you tap the "Hire" button. With proper management, they can give you an advantage, but also cost coins to hire. After hiring them, stock up with goods. Each job slot has a different stock or product you can have them sell. To stocking up, you must first order the product. After receiving it, come back and tap on it again to stock it up. You can only order stock for a single product at a time.