diff --git a/src/main/java/seedu/cafectrl/data/OrderList.java b/src/main/java/seedu/cafectrl/data/OrderList.java
index 73879ef836..91b357cfb9 100644
--- a/src/main/java/seedu/cafectrl/data/OrderList.java
+++ b/src/main/java/seedu/cafectrl/data/OrderList.java
@@ -63,7 +63,7 @@ public void printOrderList(Menu menu, Ui ui) {
 
             ui.showSalesAll(aggregatedOrder.getDishName(),
                     aggregatedOrder.getQuantity(),
-                    dollarValue.format(aggregatedOrder.calculateTotalOrderCost()));
+                    dollarValue.format(calculateTotalCost(aggregatedOrders)));
         }
 
         ui.showSalesBottom();
@@ -80,10 +80,10 @@ private void aggregateOrder(Order order, ArrayList<Order> aggregatedOrders) {
         logger.info("Aggregating order...");
         if (order.getIsComplete()) {
             int index = getIndexByDishName(aggregatedOrders, order.getDishName());
-            aggregatedOrders.get(index).setQuantity(aggregatedOrders.get(index).getQuantity()
-                    + order.getQuantity());
-            aggregatedOrders.get(index).setTotalOrderCost(aggregatedOrders.get(index).getTotalOrderCost()
-                    + order.getTotalOrderCost());
+            aggregatedOrders.get(index)
+                    .setQuantity(aggregatedOrders.get(index).getQuantity() + order.getQuantity());
+            aggregatedOrders.get(index)
+                    .setTotalOrderCost(aggregatedOrders.get(index).getTotalOrderCost() + order.getTotalOrderCost());
         }
     }
 
diff --git a/src/main/java/seedu/cafectrl/data/dish/Dish.java b/src/main/java/seedu/cafectrl/data/dish/Dish.java
index a110716517..0495d8d0ba 100644
--- a/src/main/java/seedu/cafectrl/data/dish/Dish.java
+++ b/src/main/java/seedu/cafectrl/data/dish/Dish.java
@@ -16,7 +16,7 @@ public Dish(String name, ArrayList<Ingredient> ingredients, float price) {
     }
     public Dish(String name, float price) {
         this.name = name;
-        this.ingredients = null;
+        this.ingredients = new ArrayList<>();
         this.price = price;
     }
 
diff --git a/src/main/java/seedu/cafectrl/storage/Decoder.java b/src/main/java/seedu/cafectrl/storage/Decoder.java
index 370fed6eec..4d74f6bb6b 100644
--- a/src/main/java/seedu/cafectrl/storage/Decoder.java
+++ b/src/main/java/seedu/cafectrl/storage/Decoder.java
@@ -205,24 +205,27 @@ private static void decodeSalesData(String orderLine, ArrayList<OrderList> order
             //@@author
 
             int quantity = Integer.parseInt(orderData[2].trim());
-            float decodedTotalOrderCost = Float.parseFloat(orderData[3].trim());
-            String completeStatus = orderData[4].trim();
+            float decodedDishPrice = Float.parseFloat(orderData[3].trim());
+            float decodedTotalOrderCost = Float.parseFloat(orderData[4].trim());
+            String completeStatus = orderData[5].trim();
             Dish dish = menu.getDishFromName(dishName);
 
             boolean isDataAccurate = isDishValid(orderLine, dish)
-                    && isOrderCostAccurate(orderLine, dish, quantity, decodedTotalOrderCost)
+                    && isOrderCostAccurate(orderLine, quantity, decodedDishPrice, decodedTotalOrderCost)
                     && isCompleteStatusAccurate(orderLine, completeStatus);
             if (!isDataAccurate) {
                 return;
             }
 
+            Dish dishToAdd = new Dish(dishName, decodedDishPrice);
             //creates new order and adds to orderList for specific day
             boolean isComplete = Boolean.parseBoolean(completeStatus.toLowerCase());
-            Order orderedDish = new Order(menu.getDishFromName(dishName), quantity, decodedTotalOrderCost, isComplete);
+            Order orderedDish = new Order(dishToAdd, quantity, decodedTotalOrderCost, isComplete);
             fillOrderListSize(orderLists, day);
             orderLists.get(day).addOrder(orderedDish);
         } catch (Exception e) {
             logger.log(Level.WARNING, "Line corrupted: " + e.getMessage(), e);
+            System.out.println(e.getMessage());
             ui.showToUser(ErrorMessages.INVALID_SALES_DATA + orderLine);
         }
     }
@@ -251,10 +254,9 @@ private static boolean isDishValid(String orderLine, Dish dish) {
      * @param decodedTotalOrderCost The decoded total order cost from the order line.
      * @return True if the decoded total order cost matches the expected total order cost, false otherwise.
      */
-    private static boolean isOrderCostAccurate(String orderLine, Dish dish,
-            int quantity, float decodedTotalOrderCost) {
-        float costOfDish = dish.getPrice();
-        float expectedTotalOrderCost = quantity * costOfDish;
+    private static boolean isOrderCostAccurate(String orderLine, int quantity,
+            float decodedDishPrice, float decodedTotalOrderCost) {
+        float expectedTotalOrderCost = quantity * decodedDishPrice;
         if (decodedTotalOrderCost == expectedTotalOrderCost) {
             return true;
         }
diff --git a/src/main/java/seedu/cafectrl/storage/Encoder.java b/src/main/java/seedu/cafectrl/storage/Encoder.java
index d8b11e2de8..59d4d33030 100644
--- a/src/main/java/seedu/cafectrl/storage/Encoder.java
+++ b/src/main/java/seedu/cafectrl/storage/Encoder.java
@@ -135,6 +135,7 @@ public static ArrayList<String> encodeSales(Sales sales) {
                 orderString.append((day + 1) + DIVIDER);
                 orderString.append(order.getDishName() + DIVIDER);
                 orderString.append(order.getQuantity() + DIVIDER);
+                orderString.append(order.getOrderedDish().getPrice() + DIVIDER);
                 orderString.append(order.calculateTotalOrderCost() + DIVIDER);
                 orderString.append(order.getIsComplete());
                 orderString.append(System.lineSeparator());
diff --git a/src/main/java/seedu/cafectrl/ui/ErrorMessages.java b/src/main/java/seedu/cafectrl/ui/ErrorMessages.java
index a0c0f000fa..e04a439a6d 100644
--- a/src/main/java/seedu/cafectrl/ui/ErrorMessages.java
+++ b/src/main/java/seedu/cafectrl/ui/ErrorMessages.java
@@ -79,7 +79,8 @@ public class ErrorMessages {
     public static final String INVALID_MENU_DATA = "menu.txt: Invalid format, this dish will be removed -> ";
 
     public static final String INVALID_SALES_DATA = "orders.txt: Invalid format, this order will be removed -> ";
-    public static final String INVALID_ORDER_DATA = "orders.txt: Invalid dish, this order will be removed -> ";
+    public static final String INVALID_ORDER_DATA = "orders.txt: Dish is not in current menu, "
+            + "this order will be removed -> ";
     public static final String INVALID_ORDER_STATUS = "orders.txt: Invalid status, this order will be removed -> ";
     public static final String INACCURATE_ORDER_COST_DATA = "orders.txt: The total order cost of this order -> \"%s\" "
             + "is inaccurate and will hence be updated from %.2f to %.2f instead.";