Adds increased scrapper cost when used excessively

src/main/resources/strings.yml

@@ -89,4 +89,6 @@ en:
   # The text shown if the player has to wait for more than 5 minutes
   INTERVAL_MORE_THAN_5_MINUTES: "in quite a while"
   # The marker shown when displaying values overridden for the selected NPC (not shown if the NPC inherits the default value)
-  SETTING_OVERRIDDEN_MARKER: " [NPC]"
+  SETTING_OVERRIDDEN_MARKER: " [NPC]"
+  # The translation of the text displayed when a cost is expected, but a non-number is provided
+  DOUBLE_COST_REQUIRED: "You must supply a numeric (double) cost"