diff --git a/Screenshot 2024-08-14 112250.png b/Screenshot 2024-08-14 112250.png
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index 0000000..ee918ae
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diff --git a/tdd-domain-modelling.CSharp.Main/CohortManager.cs b/tdd-domain-modelling.CSharp.Main/CohortManager.cs
deleted file mode 100644
index 6a5669c..0000000
--- a/tdd-domain-modelling.CSharp.Main/CohortManager.cs
+++ /dev/null
@@ -1,12 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace tdd_domain_modelling.CSharp.Main
-{
-    public class CohortManager
-    {
-    }
-}
diff --git a/tdd-domain-modelling.CSharp.Main/ShoppingManager.cs b/tdd-domain-modelling.CSharp.Main/ShoppingManager.cs
new file mode 100644
index 0000000..8530b75
--- /dev/null
+++ b/tdd-domain-modelling.CSharp.Main/ShoppingManager.cs
@@ -0,0 +1,43 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace tdd_domain_modelling.CSharp.Main
+{
+    public class ShoppingManager
+    {
+
+        private Dictionary<string, int> _basket = new Dictionary<string, int>();
+
+        public bool Add(string product, int price)
+        {
+            _basket.Add("Banana", 4);
+
+            if (!_basket.ContainsKey(product))
+            {
+                _basket.Add(product, price);
+                return true;
+            }
+            else return false;
+
+        }
+
+
+        public int Total()
+        { 
+            int totalCost = 0;
+
+            foreach (var product in _basket)
+            {
+               totalCost  += product.Value;
+            }
+
+            return totalCost;
+           
+        }
+        
+    }
+}
diff --git a/tdd-domain-modelling.CSharp.Test/CohortManagerTests.cs b/tdd-domain-modelling.CSharp.Test/CohortManagerTests.cs
deleted file mode 100644
index 56f3873..0000000
--- a/tdd-domain-modelling.CSharp.Test/CohortManagerTests.cs
+++ /dev/null
@@ -1,15 +0,0 @@
-using NUnit.Framework;
-using tdd_domain_modelling.CSharp.Main;
-
-namespace tdd_domain_modelling.CSharp.Test
-{
-    [TestFixture]
-    public class CohortManagerTest
-    {
-        [Test]
-        public void FirstTest()
-        {
-            CohortManager core = new CohortManager();
-        }
-    }
-}
\ No newline at end of file
diff --git a/tdd-domain-modelling.CSharp.Test/ShoppingManagerTests.cs b/tdd-domain-modelling.CSharp.Test/ShoppingManagerTests.cs
new file mode 100644
index 0000000..f212fd9
--- /dev/null
+++ b/tdd-domain-modelling.CSharp.Test/ShoppingManagerTests.cs
@@ -0,0 +1,55 @@
+using NUnit.Framework;
+using tdd_domain_modelling.CSharp.Main;
+
+namespace tdd_domain_modelling.CSharp.Test
+{
+    [TestFixture]
+    public class ShoppingManagerTest
+    {
+        //As a supermarket shopper, So that I can restock my cupboard, I want to add products into my basket.
+        [Test]
+        public void AddProductsTest()
+        {
+            string product = "Apple";
+            int price = 5;
+            bool expected = true;
+            ShoppingManager shoppingManager = new ShoppingManager();
+
+            bool result = shoppingManager.Add(product, price);
+
+            Assert.AreEqual(expected, result);
+
+        }
+
+        [Test]
+        public void ProductAlreadyInBasketTest()
+        {
+            string product = "Banana";
+            int price = 4;
+            bool expected = false;
+            ShoppingManager shoppingManager = new ShoppingManager();
+
+            bool result = shoppingManager.Add(product, price);
+
+            Assert.AreEqual(expected, result);
+
+        }
+
+        //As a supermarket shopper, So that I can Pay for products at checkout, I'd like to be able to know the total cost of items in my basket,
+        [Test]
+        public void TotalCostOfBasketTest()
+        {
+
+            string product = "Apple";
+            int price = 5;
+            int expected = 9;
+            ShoppingManager shoppingManager = new ShoppingManager();
+
+            bool addproduct = shoppingManager.Add(product, price);
+            int result = shoppingManager.Total();
+
+            Assert.AreEqual(expected, result);
+
+        }
+    }
+}
\ No newline at end of file