Saturday afternoon at a downtown clothing store: three sales clerks, one cashier, one manager, and two extra staff members who start at four. Nobody wrote anything down. At the end of the month, the manager puts the hours together from memory, and there is always someone complaining. If that scene sounds familiar, the problem isn't the people: it's that you don't have a system for each person to clock in and out. Here I explain how to approach time tracking in an Argentine retail store, which methods work in a real shop, and why that record covers you regarding the collective agreement's attendance bonus and overtime.