Create README.md

<!DOCTYPE html>
<html>
<body>

<form>
 <fieldset>
  <legend>Cost Calculator</legend>
 <table>
    <td>Cost:<input onchange="totalCost()"  id=cost /></td><tr>
    <td>Sale:<input  onchange="totalCost()"  id=sale /></td><tr>
    <td>Savings:<input  id=savings /> </td><tr>
    <td>Total:<input onchange="totalCost()" id=total /></td>
    </table>
 </fieldset>
</form>

</body>
<script>
    function totalCost() {
        var cost = document.getElementById("cost").value-0;
        var sale = document.getElementById("sale").value-0;
        var savings = sale * cost;
        document.getElementById("savings").value = cost * sale;
        document.getElementById("total").value = cost - savings;
    }
</script>
</html>