Calculate cost of workOrder

src/engine/loot/WorkOrder.java

@@ -28,6 +28,7 @@ public class WorkOrder implements Delayed {
     public int total_to_produce;
     public int total_produced;
     public HashMap<mbEnums.ResourceType, Integer> production_cost = new HashMap<>();
+    public HashMap<mbEnums.ResourceType, Integer> production_cost_total = new HashMap<>();
     public int templateID;
     public String itemName;
     public int prefixToken;