diff --git a/ShiftOS.WinForms/Applications/Calculator.Designer.cs b/ShiftOS.WinForms/Applications/Calculator.Designer.cs
index c97c754..507e382 100644
--- a/ShiftOS.WinForms/Applications/Calculator.Designer.cs
+++ b/ShiftOS.WinForms/Applications/Calculator.Designer.cs
@@ -64,6 +64,9 @@ namespace ShiftOS.WinForms.Applications
             this.button9 = new System.Windows.Forms.Button();
             this.button10 = new System.Windows.Forms.Button();
             this.buttonEquals = new System.Windows.Forms.Button();
+            this.buttonPlus = new System.Windows.Forms.Button();
+            this.buttonMinus = new System.Windows.Forms.Button();
+            this.buttonMultiply = new System.Windows.Forms.Button();
             this.SuspendLayout();
             // 
             // numBox
@@ -75,6 +78,7 @@ namespace ShiftOS.WinForms.Applications
             this.numBox.ReadOnly = true;
             this.numBox.Size = new System.Drawing.Size(143, 30);
             this.numBox.TabIndex = 0;
+            this.numBox.TextChanged += new System.EventHandler(this.numBox_TextChanged);
             // 
             // button1
             // 
@@ -185,10 +189,41 @@ namespace ShiftOS.WinForms.Applications
             this.buttonEquals.Text = "=";
             this.buttonEquals.UseVisualStyleBackColor = true;
             // 
+            // buttonPlus
+            // 
+            this.buttonPlus.Location = new System.Drawing.Point(125, 39);
+            this.buttonPlus.Name = "buttonPlus";
+            this.buttonPlus.Size = new System.Drawing.Size(22, 22);
+            this.buttonPlus.TabIndex = 13;
+            this.buttonPlus.Text = "+";
+            this.buttonPlus.UseVisualStyleBackColor = true;
+            this.buttonPlus.Click += new System.EventHandler(this.buttonPlus_Click);
+            // 
+            // buttonMinus
+            // 
+            this.buttonMinus.Location = new System.Drawing.Point(125, 67);
+            this.buttonMinus.Name = "buttonMinus";
+            this.buttonMinus.Size = new System.Drawing.Size(22, 22);
+            this.buttonMinus.TabIndex = 14;
+            this.buttonMinus.Text = "-";
+            this.buttonMinus.UseVisualStyleBackColor = true;
+            // 
+            // buttonMultiply
+            // 
+            this.buttonMultiply.Location = new System.Drawing.Point(125, 95);
+            this.buttonMultiply.Name = "buttonMultiply";
+            this.buttonMultiply.Size = new System.Drawing.Size(22, 22);
+            this.buttonMultiply.TabIndex = 15;
+            this.buttonMultiply.Text = "x";
+            this.buttonMultiply.UseVisualStyleBackColor = true;
+            // 
             // Calculator
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.Controls.Add(this.buttonMultiply);
+            this.Controls.Add(this.buttonMinus);
+            this.Controls.Add(this.buttonPlus);
             this.Controls.Add(this.buttonEquals);
             this.Controls.Add(this.button10);
             this.Controls.Add(this.button9);
@@ -202,7 +237,7 @@ namespace ShiftOS.WinForms.Applications
             this.Controls.Add(this.button1);
             this.Controls.Add(this.numBox);
             this.Name = "Calculator";
-            this.Size = new System.Drawing.Size(171, 176);
+            this.Size = new System.Drawing.Size(166, 185);
             this.ResumeLayout(false);
             this.PerformLayout();
 
@@ -222,5 +257,8 @@ namespace ShiftOS.WinForms.Applications
         private System.Windows.Forms.Button button9;
         private System.Windows.Forms.Button button10;
         private System.Windows.Forms.Button buttonEquals;
+        private System.Windows.Forms.Button buttonPlus;
+        private System.Windows.Forms.Button buttonMinus;
+        private System.Windows.Forms.Button buttonMultiply;
     }
 }
diff --git a/ShiftOS.WinForms/Applications/Calculator.cs b/ShiftOS.WinForms/Applications/Calculator.cs
index eb2df29..ee5c2e3 100644
--- a/ShiftOS.WinForms/Applications/Calculator.cs
+++ b/ShiftOS.WinForms/Applications/Calculator.cs
@@ -42,6 +42,9 @@ namespace ShiftOS.WinForms.Applications
     public partial class Calculator : UserControl, IShiftOSWindow
     {
         public bool justopened = false;
+        private int activeoperation = 0;
+        private float operationnumber = 0;
+        private float currentnumber = 0;
 
         public Calculator()
         {
@@ -51,6 +54,9 @@ namespace ShiftOS.WinForms.Applications
         private void prepareButtons()
         {
             buttonEquals.Visible = ShiftoriumFrontend.UpgradeInstalled("calc_equals_button");
+            buttonPlus.Visible = ShiftoriumFrontend.UpgradeInstalled("calc_plus_button");
+            buttonMinus.Visible = ShiftoriumFrontend.UpgradeInstalled("calc_minus_button");
+            buttonMultiply.Visible = ShiftoriumFrontend.UpgradeInstalled("calc_multiply_button");
         }
 
         public void OnLoad()
@@ -73,6 +79,11 @@ namespace ShiftOS.WinForms.Applications
             prepareButtons();
         }
 
+        private void numBox_TextChanged(object sender, EventArgs e)
+        {
+            currentnumber = float.Parse(numBox.Text);
+        }
+
         private void button1_Click(object sender, EventArgs e)
         {
             numBox.Text = numBox.Text + "1";
@@ -122,5 +133,17 @@ namespace ShiftOS.WinForms.Applications
         {
             numBox.Text = numBox.Text + "0";
         }
+
+        private void buttonPlus_Click(object sender, EventArgs e)
+        {
+            if (operationnumber == 0 && activeoperation != 1)
+            {
+                operationnumber = currentnumber;
+                activeoperation = 1;
+            } else
+            {
+
+            }
+        }
     }
 }
diff --git a/ShiftOS.WinForms/Resources/Shiftorium.txt b/ShiftOS.WinForms/Resources/Shiftorium.txt
index 8d2e199..3201cc5 100644
--- a/ShiftOS.WinForms/Resources/Shiftorium.txt
+++ b/ShiftOS.WinForms/Resources/Shiftorium.txt
@@ -18,6 +18,24 @@
 		Dependencies: "calculator",
 		Description: "Right now, you can only type numbers, but this equals button opens the door to solving equations!"
 	},
+	{
+		Name: "Calc Plus Button",
+		Cost: 700,
+		Dependencies: "calc_equals_button",
+		Description: "With this extra button, your calculator can now do addition problems!"
+	},
+	{
+		Name: "Calc Minus Button",
+		Cost: 700,
+		Dependencies: "calc_equals_button",
+		Description: "With this extra button, your calculator can now do subtraction problems!"
+	},
+	{
+		Name: "Calc Multiply Button",
+		Cost: 800,
+		Dependencies: "calc_plus_button",
+		Description: "You can add numbers together, but it must be tiring to add the same number over and over. This multiplication button will make it easier for you!"
+	},
 	{
 		Name: "MUD Fundamentals",
 		Cost: 50,