我需要使用最少的脚本或Jquery代码对html页面中的值求和

My html code:

我的HTML代码:

<tr>
    <td class="cart_product">
        <a href="/go.html?url=">
            <img src="images/cart/two.png" alt="">
        </a>
    </td>
    <td class="cart_description">
        <h4>
            <a href="/go.html?url=">Colorblock Scuba</a>
        </h4>
        <p>Web ID: 1089772</p>
    </td>
    <td class="cart_price">
        <p></p>
    </td>
    <td class="cart_quantity">
        <div class="cart_quantity_button">
            <a class="cart_quantity_up" href="/go.html?url="> + </a>
            <input class="cart_quantity_input" type="text" name="quantity" value="1" autocomplete="off" size="2">
            <a class="cart_quantity_down" href="/go.html?url="> - </a>
        </div>
    </td>
    <td class="cart_total">
        <p class="cart_total_price" name="price" id="price" class="price"></p>
    </td>
    <td class="cart_delete">
        <a class="cart_quantity_delete" href="/go.html?url=">
            <i class="fa fa-times"></i>
        </a>
    </td>
</tr>
<tr>
    <td class=