Как в minishop2 в msMiniCart вывести скидку?

<div class="not_empty">
        <div class="menu">
            <div class="title">
                <h3>Корзина</h3>
                <img src="[[++assets_url]]/media/error--orange.svg" alt="" class="close">
            </div>
            <div class="cart_items">
                [[!msMiniCartDynamic?
                    &img = `small`
                ]]
            </div>
            <div class="total">
                <div class="total_price">
                    <p>Скидка:</p>
                    <b>7 251 {$id | resource: "old_price" * $total_count} <span class="rouble">i</span></b>
                </div>
                <div class="total_price">
                    <p>ИТОГ:</p>
                    <b><strong class="ms2_total_cost">{$total_cost}</strong> <span class="rouble">i</span></b>
                </div>
            </div>
            [[AjaxSnippet?
                &snippet=`sentOrderSnip`
                &as_mode=`onclick`
                &wrapper=`tpl.sendOrder`
            ]]
            <div class="pay-vars">
                <embed src="[[++assets_url]]/media/master-card.svg">
                <embed src="[[++assets_url]]/media/visa.svg">
                <embed src="[[++assets_url]]/media/mir.svg">
            </div>
        </div>
        <h5>{'ms2_minicart' | lexicon}</h5>
        {'ms2_minicart_goods' | lexicon} <strong class="ms2_total_count">{$total_count}</strong> {'ms2_frontend_count_unit' | lexicon},
        {'ms2_minicart_cost' | lexicon} <strong class="ms2_total_cost">{$total_cost}</strong> {'ms2_frontend_currency' | lexicon}
    </div>