Sending an order form via mail?

Question

Joomla

<a class="callme_order_btn" data-product="<?php echo $item->product_name; ?>
<?php echo $item->product_sku; ?>
<?php echo K2StorePrices::number($subtotal) .'Заказ через предварительную сумму оплаты услуг '. ' URL: '.JURI::base().$item->alias; ?>"
<a href="/home/stati/46-bibendum-wisi-neque-erat-gravida-massa"title="Заказ в 1 клик"alt="Заказ в 1 клик"><img src="images/zakaz.png"
onmouseover="this.src='images/zakaz2.png';" 
onmouseout="this.src='images/zakaz.png';" /><a href="#" title="Удалить элемент" onclick="k2storeCartRemove(this, 1089, 381, 2)"> <div class="k2storeCartRemove"> </div> </a></p> 
<script type="text/javascript">
jQuery(document).ready(function($){
jQuery_2_1_1('.callme_order_btn').jbOneClick();
});
</script>

Good afternoon
On the site with K2store there is a one-click order form
How can I transfer data about the ordered product in the basket for all available items
There is such a form

<tbody>
            <?php $i=0; $k=0; $subtotal = 0;?>
            <?php foreach ($items as $item) : ?>

            	<?php
            		$image_path = K2StoreItem::getK2Image($item->product_id, $this->params);

            	?>

                <tr class="row<?php echo $k; ?>">
                    <?php if($this->params->get('show_thumb_cart')) : ?>
                    <td style="text-align: center;">
                        <?php if(!empty($image_path)) : ?>
                        <img src="<?php echo $image_path; ?>" class="itemImg<?php echo $this->params->get('cartimage_size','small') ?>" />
                        <?php endif;?>
                    </td>
                    <?php endif; ?>
                    <td style="width: 50px; text-align: center;">
                      	<strong><?php echo $item->product_name; ?></strong>
                        <br/>
                        <?php if (!empty($item->attributes_names)) : ?>
                          <?php echo $item->attributes_names; ?>
                          <br/>
                      <?php endif; ?>
                      <?php if (!empty($item->product_sku)) : ?>
                            <b><?php echo JText::_( "K2STORE_SKU" ); ?>:</b>
                            <?php echo $item->product_sku; ?>
                            <br/>
                        <?php endif; ?>

                         <?php echo JText::_( "K2STORE_ITEM_PRICE" ); ?>: <?php echo K2StorePrices::number($item->product_price); ?>

                    </td>
                    <td style="width: 50px; text-align: center;">
                        <?php echo $item->product_qty; ?>
                    </td>
                    <td style="text-align: right;">
                        <?php $subtotal = $subtotal + $item->subtotal; ?>
                        <?php echo K2StorePrices::number($item->subtotal); ?>
                    </td>
                    <td><a title="<?php echo JText::_( 'K2STORE_CART_REMOVE_ITEM' ); ?>" onclick="k2storeCartRemove(this, <?php echo $item->cart_id; ?>, <?php echo $item->product_id; ?>, 1)"> <div class="k2storeCartRemove"> </div>  </a>  </td>
                </tr>
            <?php ++$i; $k = (1 - $k); ?>
            <?php endforeach; ?>
            </tbody>

It displays the value of all products with the name, quantity and amount in the table.
You can somehow transfer these values ​​​​through
this form

break;
    default:
        sendmail("Заказ с сайта", render(
                        '<div><b>Имя:</b> '.stripinput($_POST['name']).'</div>'.
                        '<div><b>Телефон:</b> '.stripinput($_POST['tel']).'</div>'.
                        '<div><b>Сумма заказа:</b> '.stripinput($_POST['product']).'</div>'
                        
        ),$EMAIL,$FROM,$REPLY);