diff --git a/src/main/kotlin/day1/Day1.kt b/src/main/kotlin/day1/Day1.kt
index 1848a4d..36bb425 100644
--- a/src/main/kotlin/day1/Day1.kt
+++ b/src/main/kotlin/day1/Day1.kt
@@ -7,10 +7,14 @@ import java.util.stream.Collectors
 class Day1 {
     fun run(inputFile: Path): Long {
         return loadFile(inputFile).parallelStream()
-            .map { it.toLong().div(3).minus(2) }
+            .map {calculateCost(it)}
             .collect(Collectors.summingLong { it } )
     }
 
+    private fun calculateCost(x: String): Long {
+        return x.toLong().div(3).minus(2)
+    }
+
     private fun loadFile(inputFile: Path): List<String> {
         return Files.readAllLines(inputFile)
     }