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diff --git a/models/stock_inventory_revaluation.py b/models/stock_inventory_revaluation.py
index 6f98f9f..011a9c0 100755
--- a/models/stock_inventory_revaluation.py
+++ b/models/stock_inventory_revaluation.py
@@ -118,6 +118,41 @@ class StockInventoryRevaluation(models.Model):
         
         # Create Stock Valuation Layer
         self._create_valuation_layer(move)
+
+        # AVCO/FIFO Logic: Update Standard Price and Distribute Value to Layers
+        # This fixes the issue where revaluation creates a layer but doesn't update the moving average cost
+        if self.product_id.categ_id.property_cost_method in ['average', 'fifo'] and self.quantity > 0:
+            # 1. Update Standard Price
+            # We use disable_auto_svl to prevent Odoo from creating an extra SVL for this price change
+            new_std_price = self.product_id.standard_price + (self.extra_cost / self.quantity)
+            self.product_id.with_context(disable_auto_svl=True).sudo().write({'standard_price': new_std_price})
+            
+            # 2. Distribute Value to Remaining Layers (Crucial for correct COGS later)
+            remaining_svls = self.env['stock.valuation.layer'].search([
+                ('product_id', '=', self.product_id.id),
+                ('remaining_qty', '>', 0),
+                ('company_id', '=', self.company_id.id),
+            ])
+            
+            if remaining_svls:
+                remaining_qty_total = sum(remaining_svls.mapped('remaining_qty'))
+                if remaining_qty_total > 0:
+                    remaining_value_to_distribute = self.extra_cost
+                    remaining_value_unit_cost = remaining_value_to_distribute / remaining_qty_total
+                    
+                    for layer in remaining_svls:
+                        if float_compare(layer.remaining_qty, remaining_qty_total, precision_rounding=self.product_id.uom_id.rounding) >= 0:
+                            taken_remaining_value = remaining_value_to_distribute
+                        else:
+                            taken_remaining_value = remaining_value_unit_cost * layer.remaining_qty
+                            
+                        # Rounding
+                        taken_remaining_value = self.currency_id.round(taken_remaining_value)
+                        
+                        layer.sudo().write({'remaining_value': layer.remaining_value + taken_remaining_value})
+                        
+                        remaining_value_to_distribute -= taken_remaining_value
+                        remaining_qty_total -= layer.remaining_qty
         
         self.state = 'done'