diff --git a/src/main/java/edu/ntnu/idi/idatt2003/g40/mappe/Sale.java b/src/main/java/edu/ntnu/idi/idatt2003/g40/mappe/Sale.java
index e69de29..8fcf55b 100644
--- a/src/main/java/edu/ntnu/idi/idatt2003/g40/mappe/Sale.java
+++ b/src/main/java/edu/ntnu/idi/idatt2003/g40/mappe/Sale.java
@@ -0,0 +1,31 @@
+package edu.ntnu.idi.idatt2003.g40.mappe;
+
+/**
+ * Sale represents sales the player commits.
+ *
+ * <p>Extends {@link Transaction}</p>
+ *
+ * */
+public class Sale extends Transaction {
+
+  /**
+   * Constructor.
+   *
+   * @param share the {@link Share} object to purchase.
+   * @param week the week to purchase during.
+   * @param calculator the {@link TransactionCalculator} object to calculate this purchase.
+   * */
+  public Sale(final Share share, final int week, final TransactionCalculator calculator) {
+    super(share, week, calculator);
+  }
+
+  /**
+   * Commits the purchase.
+   *
+   * @param player the {@link Player} object performing the purchase.
+   * */
+  @Override
+  public void commit(final Player player) {
+    commited = true;
+  }
+}
diff --git a/src/main/java/edu/ntnu/idi/idatt2003/g40/mappe/Transaction.java b/src/main/java/edu/ntnu/idi/idatt2003/g40/mappe/Transaction.java
index 4030335..78156de 100644
--- a/src/main/java/edu/ntnu/idi/idatt2003/g40/mappe/Transaction.java
+++ b/src/main/java/edu/ntnu/idi/idatt2003/g40/mappe/Transaction.java
@@ -12,7 +12,7 @@ public abstract class Transaction {
 
   private final TransactionCalculator calculator;
 
-  private boolean commited = false;
+  protected boolean commited = false;
 
   /**
    * Creates a new {@code Transaction} with a share, week and calculator.
@@ -62,7 +62,5 @@ public boolean isCommited() {
   }
 
   /** Commits the transaction. */
-  public void commit() {
-    commited = true;
-  }
+  public abstract void commit(Player player);
 }
diff --git a/src/test/java/edu/ntnu/idi/idatt2003/g40/mappe/SaleTest.java b/src/test/java/edu/ntnu/idi/idatt2003/g40/mappe/SaleTest.java
index a65d41b..12f14f7 100644
--- a/src/test/java/edu/ntnu/idi/idatt2003/g40/mappe/SaleTest.java
+++ b/src/test/java/edu/ntnu/idi/idatt2003/g40/mappe/SaleTest.java
@@ -1,3 +1,36 @@
-public class SaleTest {
-    
+package edu.ntnu.idi.idatt2003.g40.mappe;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.math.BigDecimal;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Test class for {@link Sale}.
+ * */
+class SaleTest {
+
+  Stock testStock = new Stock("AAPL", "Apple Inc.", new BigDecimal("100.00"));
+  Share testShare = new Share(testStock, new BigDecimal("10"), new BigDecimal("10"));
+  SaleCalculator testSaleCalculator = new SaleCalculator(testShare);
+  Player testPlayer = new Player("TestName", new BigDecimal("1000.00"));
+
+  @Test
+  void constructor_sets_values() {
+    Sale sale = new Sale(testShare, 1, testSaleCalculator);
+
+    assertEquals(testShare, sale.getShare());
+    assertEquals(1, sale.getWeek());
+    assertEquals(testSaleCalculator, sale.getCalculator());
+  }
+
+  @Test
+  void commit_method_sets_commit_to_true() {
+    Sale sale = new Sale(testShare, 1, testSaleCalculator);
+
+    sale.commit(testPlayer);
+
+    assertTrue(sale.isCommited());
+  }
 }