{% if certificate.total_price is not null %}
    <div class="price sale-price">
        <span>{{ certificate.price }}</span> ₽
        <div>
            <span>{{ certificate.total_price }}</span> ₽
        </div>
    </div>
{% else %}
    <div class="price sale-price">
        <div>
            <span>{{ certificate.price }}</span> ₽
        </div>
    </div>
{% endif %}