This chapter uses a fun example (whether or not to purchase a lock for your gym locker) to demonstrate how to estimate the costs of different probabilistic scenarios. The example introduces subcharts, and provides more practice with building custom equations. In addition, it demonstrates how to use variables for storage, and how to handle values that might require conversion to different units. Learn more about RENO: https://www.reliasoft.com/products/reliability-analysis/reno