\"# Cost Center Integration - Complete Guide\"  
\"\"  
\"## Status: Implementation In Progress\"  
\"\"  
\"### Completed Steps:\"  
\"1. Migration: Add cost_center_id to chart_of_accounts\"  
\"2. Migration: Add cost_center_id to journal_entries\"  
\"3. Created CostCenterReportController\"  
\"\"  
\"### Remaining Steps:\"  
\"1. Update ChartOfAccount Model - Add costCenter() relationship\"  
\"2. Update JournalEntry Model - Add costCenter() relationship\"  
\"3. Update ChartOfAccountController - Add cost_center_id field\"  
\"4. Update Journal Entry Forms - Add Cost Center selector\"  
\"5. Add Validation Rules - Require cost_center for revenue/expense accounts\"  
\"6. Create Report Views\"  
