Help - calculate total of multiple input fields

Help - calculate total of multiple input fields

Hello,

I have been working on a small freight calculator, cubic amounts are calculated based on quantity and a formula.

Here is my current JSFiddle
http://jsfiddle.net/weedy/vcD9A/

At the moment, i would like the quantities column (inputs) to be totaled at the bottom in a span element called "totalquantity". I have got the total working for the cubics column.

jquery example, please see full code on jsfiddle http://jsfiddle.net/weedy/vcD9A/
  1. function total() {
        $('.totalcubics').html(function () {
            var total = 0;
            $('table').find('span').not(this).each(function () {
                var n = parseFloat($(this).text());
                total += isNaN(n) ? 0 : n;
            });
            return total.toFixed(2);
        });
    }

    $("#07flute").keyup(function () {
        var val = parseFloat($(this).val());
        val = (val ? val / 50 * 0.0113 : "");
        $("#cubics").text(val);
        total();
    });

    $("#08flute").keyup(function () {
        var val = parseFloat($(this).val());
        val = (val ? val / 50 * 0.0128 : "");
        $("#cubics2").text(val);
        total();

    });

    $("#09Bflute").keyup(function () {
        var val = parseFloat($(this).val());
        val = (val ? val / 50 * 0.02862 : "");
        $("#cubics3").text(val);
        total();

    });

    $("#09Eflute").keyup(function () {
        var val = parseFloat($(this).val());
        val = (val ? val / 50 * 0.0156 : "");
        $("#cubics4").text(val);
        total();

    });









































I am quite a novice, so any solution would be greatly appreciated. Thanks