How to get the currency in a custom print format?

I am building a custom print format and want to map the currency to the totals.

{% for group in doc.items | groupby("item_code") %}
{% set group_count = group.list|length %}
{% set count = 1 %}
{% set item_desc = [] %}
    {% for item in group.list %}
        {% if count == 1 -%}
            {% set _ = item_desc.append(item.item_name) %}
        {%- endif %}
        {% set count = count + 1 %}
    {%- endfor %}
    <tr>
        <td style="width: 35%; text-align: left;">{{ group.grouper }} - {{ item_desc[0] }}</td>
        {% set tot_qty = group.list|sum(attribute='qty') %}
        {% set tot_amt = group.list|sum(attribute='net_amount') %}
        {% set avg_rate = tot_amt / tot_qty %}
        <td style="width: 15%; text-align: right;">{{ (tot_qty | round(2)|string).rstrip('0').rstrip('.') }} </td>
        <td style="width: 15%; text-align: right;">{{ "{:,.2f}".format(avg_rate) }} </td>
       <td style="width: 25%; text-align: right;">{{ "{:,.2f}".format(tot_amt) }}</td>
    </tr>
{%- endfor %}

img

Use

doc.get_formatted(“field_name”,“parent_doc”)