This activity is awesome! Students learn what it takes to run a business. This activity involves students calculating the monthly cost of labor. Students will write checks to their employees. In addition, students will determine their monthly profit after paying for labor, rent, utilities, and inventory. This is also a great activity for students learning how to do markups, discounts, and sales tax. This is a 7th grade Common Core standard (7.RP.A.3) but I am sure that it can also be used in other classes.