workerOrder cost updating

src/engine/gameManager/ForgeManager.java

@@ -141,7 +141,7 @@ public enum ForgeManager implements Runnable {
     public static long calcRollingDuration(WorkOrder workOrder) {
 
         long rollingDuration;
-        float rate = (float) (2.5 * (workOrder.vendor.getBuilding().getRank() - 1));
+        float rate = (float) 2.5 * (workOrder.vendor.getBuilding().getRank() - 1);
         float baseTime = (20 - rate) * 60000;
         ItemTemplate template = ItemTemplate.templates.get(workOrder.templateID);