This document presents an explanatory case on simulation. It describes a bakery that stocks cakes with a known daily demand pattern and probabilities. A sequence of random numbers is used to simulate the demand over 10 days. The daily demands are determined by matching the random numbers to ranges based on the demand probabilities. The average demand over the 10 days is then calculated. Students are instructed to solve this simulation case as an exercise to understand how to apply simulation to model uncertain outcomes.