Testing Replenishment Logic:
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Product                   | Safe       | Floor      | Unit       | Suggested 
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Ramen (Unit=1)            | 5          | 2          | 1          | 3         
Drink (Unit=6)            | 10         | 8          | 6          | 6         
Cigarette (Unit=10)       | 20         | 15         | 10         | 10        
Limited Stock (Unit=10)   | 20         | 15         | 10         | 3