Refactor code

src/utils/calculatePrice.ts

@@ -10,7 +10,7 @@ export function calculatePrice(source: PriceSource, base: number): number {
   if (source.priceRange) {
     const parts = source.priceRange.split("–").map(Number)
     const max = Math.max(...parts)
-    return isNaN(max) ? 0 : max
+    return Number.isNaN(max) ? 0 : max
   }
   return 0
 }
@@ -39,8 +39,8 @@ export function calculatePriceRange(
       const min = Number(minStr)
       const max = Number(maxStr)
 
-      if (!isNaN(min)) minExtra += min
-      if (!isNaN(max)) maxExtra += max
+      if (!Number.isNaN(min)) minExtra += min
+      if (!Number.isNaN(max)) maxExtra += max
     }
   }