private: System::Void btnCheckout_Click(System::Object^ sender, System::EventArgs^ e) { int numItems=0; double salesTaxRate=0.0775; double totalPrice=0; double taxDue=0; double itemPrice=0; //---compute item price and assign it itemPrice = Convert::ToDouble(txtPrice->Text); //---get number of items numItems = Convert::ToInt16(txtQuantity->Text); //---compute tax taxDue = salesTaxRate * numItems * itemPrice; //---format tax into label with 2 decimal places. N= Number & 2 = two deciaml places lblTax->Text = taxDue.ToString("n2"); //---compute total due & put it into label formatted as currency (adds a $) totalPrice = (itemPrice * numItems) + taxDue; lblTotal->Text = totalPrice.ToString("c2"); }