done restructure calculation retribution

app/Services/RetributionCalculatorService.php

@@ -16,7 +16,8 @@ class RetributionCalculatorService
         int $buildingTypeId,
         int $floorNumber,
         float $buildingArea,
-        bool $saveResult = true
+        bool $saveResult = true,
+        bool $excelCompatibleMode = false
     ): array {
         // Get building type with indices
         $buildingType = BuildingType::with('indices')->findOrFail($buildingTypeId);
@@ -49,7 +50,8 @@ class RetributionCalculatorService
             $infrastructureMultiplier,
             $heightMultiplier,
             $floorNumber,
-            $buildingArea
+            $buildingArea,
+            $excelCompatibleMode
         );
 
         // Save result if requested
@@ -78,7 +80,8 @@ class RetributionCalculatorService
         float $infrastructureMultiplier,
         float $heightMultiplier,
         int $floorNumber,
-        float $buildingArea
+        float $buildingArea,
+        bool $excelCompatibleMode = false
     ): array {
         // Step 1: Calculate H5 coefficient (Excel formula: RUNDOWN(($E5*($F5+$G5+(0.5*H$3))),4))
         // H5 = coefficient * (ip_permanent + ip_complexity + (height_multiplier * height_index))
@@ -100,7 +103,15 @@ class RetributionCalculatorService
         $infrastructureCalculation = $infrastructureMultiplier * $mainCalculation;
 
         // Step 4: Total retribution (Main + Infrastructure)
-        $totalRetribution = $mainCalculation + $infrastructureCalculation;
+        if ($excelCompatibleMode) {
+            // Try to match Excel exactly - round intermediate calculations
+            $mainCalculation = round($mainCalculation, 0);
+            $infrastructureCalculation = round($infrastructureCalculation, 0);
+            $totalRetribution = $mainCalculation + $infrastructureCalculation;
+        } else {
+            // Apply standard rounding to match Excel results more closely
+            $totalRetribution = round($mainCalculation + $infrastructureCalculation, 0);
+        }
 
         return [
             'building_type' => [