I need to calculate quantity multiply unit price inputs and equal input will be subtotal and sum all subtotals...

I used this code in javascript, and it is working fine, but in table didn't work.

Please help.

HTML/PHP:

<table border="0" cellspacing="0" class="table table-bordered table-hover" data-name="cont-table">
    <thead style="">
        <tr>
            <th class="check-this"><input class="check_all" type="checkbox" onclick="select_all()"/></th>
            <th class="text-center"> م </th>
            <th class="text-center"> اسم الصنف </th>
            <th class="text-center"> الوحدة </th>
            <th class="text-center"> الكمية </th>
            <th class="text-center"> سعر الوحدة </th>
            <th class="text-center"> العام المالي </th>
            <th class="text-center"> إجمالي قيمة الصنف </th>
        </tr>
    </thead>
    <tr>
        <td><input type="checkbox" class="case"/></td>
        <td><span id="snum">1.</span></td>
        <td><!--<input type="text" id="first_name" name="first_name[]"/>!-->
        <select class="select" id="first_name" name="first_name[]">
            <?php
                $stmt = $db->query("SELECT first_name6 FROM item");
                //$stmt = $pdo->execute();
                while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
                    echo "<option >" . $row['first_name6'] . "</option>";
                }
            ?>
        </select></td>
        <td><!--<input type="text" id="last_name" name="last_name[]"/>!-->
        <select class="select" id="first_name" name="first_name[]">
            <?php
                $stmt = $db->query("SELECT first_name7 FROM unit");
                //$stmt = $pdo->execute();
                while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
                    echo "<option >" . $row['first_name7'] . "</option>";
                }
            ?>
        </select></td>
        <td><input class="select qty" type="number" id="tamil" name="tamil[]"/></td>
        <td><input class="select unit" type="number" id="english" name="english[]" /></td>
        <td><!--<input type="text" id="computer" name="computer[]"/>!-->
        <select class="select " id="first_name" name="first_name[]">
            <?php
                $stmt = $db->query("SELECT first_name8 FROM financial");
                //$stmt = $pdo->execute();
                while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
                    echo "<option >" . $row['first_name8'] . "</option>";
                }
            ?>
        </select></td>
        <td><input type="text" id="total" class="amount" value="" /></td>
    </tr>
</table>
<button id="add_row"  type="button" class="delete btn btn-default pull-right">مسح</button>
<button id="add_row" style="margin-right:5px;" type="button" class="addmore btn btn-default pull-right">اضاف صنف</button>
<br>
<br>
<h3 class="table-h3 " style="text-align:center;">اجمالي قيمة العقد</h3>
<input type="text" name="totalprice" class="result" value="" />

and this is the javascript code:

$(".qty").on('input', function () {
    var self = $(this);
    var unitVal = self.next().val();
    self.next().next().val(unitVal * self.val());
    fnAlltotal();
});
$(".unit").on('input', function () {
    var self = $(this);
    var qtyVal = self.prev().val();
    self.next().val(qtyVal * self.val());
    fnAlltotal();
});
function fnAlltotal(){
    var total=0
    $(".amount").each(function(){
        total += parseFloat($(this).val()||0);
    });
    $(".result").val(total);
}

java怎么获取from-data的表单的参数

两只大孔雀

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