java dropdown计算出的数字发布到下一页

I have a form with dropdown select, each selection adds the value to calculate a total. I did so with the script below:

$(function(){
    $("select.calculate").on("change", calc);
    $("input[type=checkbox].calculate").on("click", calc);
    function calc() {
        var basePrice = 60;
        newPrice = basePrice;
        $("select.calculate option:selected, input[type=checkbox].calculate:checked").each(function () {
            newPrice += parseInt($(this).data('price'), 10);
        });

        newPrice = newPrice.toFixed(2);
        $("#item-price").html(newPrice);
    }
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select id="test" input name="test" class="calculate">
    <option data-price="0" value=" ">0</option>
    <option data-price="70" value="Test x 1">1</option>
    <option data-price="140" value="Test x 2">2</option>
    <option data-price="210" value="Test x 3">3</option>
</select>

<span id="item-price">0</span>

It works great on the page, but I want to carry the total number forward to the next page, like how I would carry the chosen choices. I am using the POST method, so far the next page is able to get the choices I made via POST.

But I can't seem to figure out how I would go about getting the total number to be carried forward to next page.

Any ideas?

</div>

you need to save the value in hidden field and then post to the next page just like below

<input type='hidden' name='item_price' value='' id='item_price_val'>

change your jquery function with

$(function(){
$("select.calculate").on("change", calc);
$("input[type=checkbox].calculate").on("click", calc);
    function calc() {
        var basePrice = 60;
        newPrice = basePrice;
        $("select.calculate option:selected, input[type=checkbox].calculate:checked").each(function () {
            newPrice += parseInt($(this).data('price'), 10);
        });

        newPrice = newPrice.toFixed(2);
        $("#item-price").html(newPrice);
        $("#item_price_val").val(newPrice);

    }
});

and on PHP page get the value from the input variable like

$item_price = $_POST['item_price'];

I hope it will works for you.