1 files changed, 82 insertions, 0 deletions
diff --git a/invoice_total1/InvoiceTotal/frmInvoiceTotal.cs b/invoice_total1/InvoiceTotal/frmInvoiceTotal.cs
new file mode 100644
index 0000000..8f7ed8d
--- /dev/null
+++ b/invoice_total1/InvoiceTotal/frmInvoiceTotal.cs
@@ -0,0 +1,82 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace InvoiceTotal
+{
+	public partial class frmInvoiceTotal : Form
+	{
+        public frmInvoiceTotal()
+		{
+			InitializeComponent();
+		}
+
+		int numInvoices = 0;
+		decimal smallestInvoice = Decimal.MaxValue;
+		decimal largestInvoice = 0m;
+        decimal avgInvoice = 0m;
+        decimal invoicesTotal = 0m;
+
+        private void btnCalculate_Click(object sender, EventArgs e)
+		{
+			decimal subtotal = Decimal.Parse(txtEnterSubtotal.Text);
+			decimal discountPercent = .25m;
+			decimal discountAmount = Math.Round(subtotal * discountPercent, 2);
+			decimal invoiceTotal = Math.Round(subtotal - discountAmount, 2);
+
+            numInvoices++;
+            invoicesTotal += invoiceTotal;
+			avgInvoice = invoicesTotal / numInvoices;
+
+			if (invoiceTotal < smallestInvoice)
+				smallestInvoice = invoiceTotal;
+			if (invoiceTotal > largestInvoice)
+				largestInvoice = invoiceTotal;
+
+			txtSubtotal.Text = subtotal.ToString("c");
+            txtDiscountPercent.Text = discountPercent.ToString("p1");
+			txtDiscountAmount.Text = discountAmount.ToString("c");
+			txtTotal.Text = invoiceTotal.ToString("c");
+			txtNumInvoices.Text = numInvoices.ToString();
+            txtSmallestInvoice.Text = smallestInvoice.ToString("c");
+            txtLargestInvoice.Text = largestInvoice.ToString("c");
+            txtAvgInvoice.Text = avgInvoice.ToString("c");
+            txtInvoicesTotal.Text = invoicesTotal.ToString("c");
+
+            txtEnterSubtotal.Focus();
+		}
+
+		private void btnExit_Click(object sender, EventArgs e)
+		{
+			this.Close();
+		}
+
+        private void btnClear_Click(object sender, EventArgs e)
+        {
+            numInvoices = 0;
+            smallestInvoice = Decimal.MaxValue;
+            largestInvoice = 0m;
+            avgInvoice = 0m;
+            invoicesTotal = 0m;
+
+            txtEnterSubtotal.Text = "";
+			txtSubtotal.Text = "";
+			txtDiscountPercent.Text = "";
+			txtDiscountAmount.Text = "";
+			txtTotal.Text = "";
+			txtNumInvoices.Text = "";
+			txtInvoicesTotal.Text = "";
+			txtSmallestInvoice.Text = "";
+			txtLargestInvoice.Text = "";
+            txtAvgInvoice.Text = "";
+
+			txtEnterSubtotal.Focus();
+        }
+    }
+}
\ No newline at end of file