diff --git a/app/Services/Quote/Handlers/KyungdongFormulaHandler.php b/app/Services/Quote/Handlers/KyungdongFormulaHandler.php
index 430d57d..83727ae 100644
--- a/app/Services/Quote/Handlers/KyungdongFormulaHandler.php
+++ b/app/Services/Quote/Handlers/KyungdongFormulaHandler.php
@@ -283,6 +283,33 @@ public function getShaftPrice(string $size, float $length): float
         return $this->priceService->getShaftPrice($size, $length);
     }
 
+    /**
+     * 5130 고정 샤프트 제품 규격 매핑
+     * col59~65: 3인치 300, 4인치 3000/4500/6000, 5인치 6000/7000/8200
+     *
+     * @param  string  $size  인치 (3, 4, 5)
+     * @param  float  $lengthMm  W0 올림값 (mm)
+     * @return float 매핑된 길이 (m 단위), 0이면 매핑 불가
+     */
+    private function mapShaftToFixedProduct(string $size, float $lengthMm): float
+    {
+        $products = match ($size) {
+            '3' => [300],
+            '4' => [3000, 4500, 6000],
+            '5' => [6000, 7000, 8200],
+            default => [6000, 7000, 8200],  // 기본 5인치
+        };
+
+        // 올림값 이상인 제품 중 가장 작은 것 선택
+        foreach ($products as $productMm) {
+            if ($lengthMm <= $productMm) {
+                return $productMm / 1000;  // mm → m
+            }
+        }
+
+        return 0;  // 매핑 불가 (초과)
+    }
+
     /**
      * 파이프 단가 조회
      */
@@ -495,9 +522,9 @@ public function calculateSteelItems(array $params): array
                 'item_name' => '환봉',
                 'specification' => '',
                 'unit' => 'EA',
-                'quantity' => $roundBarQty * $quantity,
+                'quantity' => $roundBarQty,
                 'unit_price' => $roundBarPrice,
-                'total_price' => $roundBarPrice * $roundBarQty * $quantity,
+                'total_price' => $roundBarPrice * $roundBarQty,
             ];
         }
 
@@ -635,10 +662,12 @@ public function calculatePartItems(array $params): array
         $productType = $params['product_type'] ?? 'screen';
         $quantity = (int) ($params['QTY'] ?? 1);
 
-        // 1. 감기샤프트
+        // 1. 감기샤프트 (5130: col59~65 고정 제품)
+        // 5130 고정 규격: 3인치→0.3m, 4인치→3/4.5/6m, 5인치→6/7/8.2m
         $shaftSize = $bracketInch;
-        $shaftLength = ceil($width / 1000);  // mm → m 변환 후 올림
-        $shaftPrice = $this->getShaftPrice($shaftSize, $shaftLength);
+        $shaftLengthMm = ceil($width / 1000) * 1000;  // W0 → 올림 (mm)
+        $shaftLength = $this->mapShaftToFixedProduct($shaftSize, $shaftLengthMm);
+        $shaftPrice = $shaftLength > 0 ? $this->getShaftPrice($shaftSize, $shaftLength) : 0;
         if ($shaftPrice > 0) {
             $items[] = [
                 'category' => 'parts',
@@ -756,9 +785,9 @@ public function calculatePartItems(array $params): array
                 'item_name' => "앵글 {$mainAngleType}",
                 'specification' => "{$mainAngleSize}m",
                 'unit' => 'EA',
-                'quantity' => $mainAngleQty * $quantity,
+                'quantity' => $mainAngleQty,
                 'unit_price' => $mainAnglePrice,
-                'total_price' => $mainAnglePrice * $mainAngleQty * $quantity,
+                'total_price' => $mainAnglePrice * $mainAngleQty,
             ];
         }
 
@@ -791,9 +820,9 @@ public function calculateDynamicItems(array $inputs): array
         $area = ($W1 * ($H1 + 550)) / 1000000;
         $weight = $area * ($productType === 'steel' ? 25 : 2) + ($width / 1000) * 14.17;
 
-        // 모터 용량/브라켓 크기 계산
-        $motorCapacity = $this->calculateMotorCapacity($productType, $weight, $bracketInch);
-        $bracketSize = $this->calculateBracketSize($weight, $bracketInch);
+        // 모터 용량/브라켓 크기 계산 (입력값 우선, 없으면 자동계산)
+        $motorCapacity = $inputs['MOTOR_CAPACITY'] ?? $this->calculateMotorCapacity($productType, $weight, $bracketInch);
+        $bracketSize = $inputs['BRACKET_SIZE'] ?? $this->calculateBracketSize($weight, $bracketInch);
 
         // 입력값에 계산된 값 추가 (부자재 계산용)
         $inputs['WEIGHT'] = $weight;
@@ -842,6 +871,8 @@ public function calculateDynamicItems(array $inputs): array
         ];
 
         // 3. 제어기 (5130: 매립형×col15 + 노출형×col16 + 뒷박스×col17)
+        // 5130: 제어기 = price_매립 × col15 + price_노출 × col16 + price_뒷박스 × col17
+        // col15/col16/col17은 고정 수량 (QTY와 무관, $su를 곱하지 않음)
         $controllerType = $inputs['controller_type'] ?? '매립형';
         $controllerQty = (int) ($inputs['controller_qty'] ?? 1);
         $controllerPrice = $this->getControllerPrice($controllerType);
@@ -852,13 +883,13 @@ public function calculateDynamicItems(array $inputs): array
                 'item_name' => "제어기 {$controllerType}",
                 'specification' => $controllerType,
                 'unit' => 'EA',
-                'quantity' => $controllerQty * $quantity,
+                'quantity' => $controllerQty,
                 'unit_price' => $controllerPrice,
-                'total_price' => $controllerPrice * $controllerQty * $quantity,
+                'total_price' => $controllerPrice * $controllerQty,
             ];
         }
 
-        // 뒷박스 (5130: col17 수량)
+        // 뒷박스 (5130: col17 수량, QTY와 무관)
         $backboxQty = (int) ($inputs['backbox_qty'] ?? 1);
         if ($backboxQty > 0) {
             $backboxPrice = $this->getControllerPrice('뒷박스');
@@ -869,14 +900,18 @@ public function calculateDynamicItems(array $inputs): array
                     'item_name' => '뒷박스',
                     'specification' => '',
                     'unit' => 'EA',
-                    'quantity' => $backboxQty * $quantity,
+                    'quantity' => $backboxQty,
                     'unit_price' => $backboxPrice,
-                    'total_price' => $backboxPrice * $backboxQty * $quantity,
+                    'total_price' => $backboxPrice * $backboxQty,
                 ];
             }
         }
 
         // 4. 절곡품
+        // installation_type → guide_type 매핑 (calculateSteelItems는 guide_type 사용)
+        if (isset($inputs['installation_type']) && ! isset($inputs['guide_type'])) {
+            $inputs['guide_type'] = $inputs['installation_type'];
+        }
         $steelItems = $this->calculateSteelItems($inputs);
         $items = array_merge($items, $steelItems);