I have chosen to take a closer look at some of America's most popular pizza chains, such as Domino's and Papa John's. For Domino's, things like rent for their stores stay the same each month (fixed costs), while ingredients for pizzas go up when they sell more (variable costs). Paying their staff can differ depending on the season; there's a base salary for everyone, but they pay more to people who work extra when it's busy. Papa John's works similarly. They have fixed costs like rent and bills, but their ingredient costs rise when they make more pizzas. The pay of delivery drivers can also change; they get a set wage, but they also get extra tips for every delivery they make. Understanding these different types of costs helps make informed decisions about pricing, staffing, and managing their finances to ensure profitability and efficiency in their operations