CASE SCENARIO You are an HR professional at Headgames Inc., a manufacturer of helmet inserts. After six months in your role, the CEO, John Daily, questions you about the total cost of the workforce and its contribution to the company's revenue. To address his concerns, you will perform a series of calculations to present at the next manager meeting. DATA CLEANING TIP: Before using any numbers, use the Excel UNIQUE function to verify that the key columns have correct values, eliminating any unexpected values. This step is part of the data cleaning process, which should be performed on all data before analysis.