diff --git a/app/Services/Quote/Handlers/KyungdongFormulaHandler.php b/app/Services/Quote/Handlers/KyungdongFormulaHandler.php
index 151daa9..430d57d 100644
--- a/app/Services/Quote/Handlers/KyungdongFormulaHandler.php
+++ b/app/Services/Quote/Handlers/KyungdongFormulaHandler.php
@@ -229,12 +229,10 @@ private function getMotorCapacityByWeight(float $weight, ?string $bracketInch =
      */
     public function calculateScreenPrice(float $width, float $height): array
     {
-        // 면적 계산: W1 × (H1 + 550) / 1,000,000
-        // W1 = W0 + 160, H1 = H0 + 350 (레거시 5130 공식)
-        $W1 = $width + 160;
-        $H1 = $height + 350;
-        $calculateHeight = $H1 + 550;
-        $area = ($W1 * $calculateHeight) / 1000000;
+        // 면적 계산: W0 × (H0 + 550) / 1,000,000
+        // 5130 공식: col10 × (col11 + 550) / 1,000,000
+        $calculateHeight = $height + 550;
+        $area = ($width * $calculateHeight) / 1000000;
 
         // 원자재 단가 조회 (실리카/스크린)
         $unitPrice = $this->getRawMaterialPrice('실리카');