firefly-iii/resources/views/reports/partials/category-period.twig

<table class="table table-hover sortable table-condensed">
    <thead>
    <tr>
        <th rowspan="2" data-defaultsort="disabled">{{ 'category'|_ }}</th>
        {% for period in periods %}
            <th colspan="2" data-defaultsort="disabled">{{ period }}</th>
        {% endfor %}
        <th colspan="2" data-defaultsort="disabled">{{ 'sum'|_ }}</th>
    </tr>
    <tr>
        {% for period in periods %}
            <th data-defaultsign="_19">In</th>
            <th data-defaultsign="_19">Out</th>
        {% endfor %}
        <th data-defaultsign="_19">In</th>
        <th data-defaultsign="_19">Out</th>
    </tr>
    </thead>
    <tbody>
    {% for category in categories %}
        {% if report.income[category.id] or report.expense[category.id] %}
        <tr>
            <td data-value="{{ category.name }}">
                <a title="{{ category.name }}" href="#" data-category="{{ category.id }}" class="category-chart-activate">{{ category.name }}</a>
            </td>

            {% for key, period in periods %}
                {# income first #}
                {% if(report.income[category.id].entries[key]) %}
                    <td data-value="{{ report.income[category.id].entries[key] }}">
                        {{ report.income[category.id].entries[key]|formatAmount }}
                    </td>
                {% else %}
                    <td data-value="0">
                        {{ 0|formatAmount }}
                    </td>
                {% endif %}

                {# expenses #}
                {% if(report.expense[category.id].entries[key]) %}
                    <td data-value="{{ report.expense[category.id].entries[key] }}">
                        {{ report.expense[category.id].entries[key]|formatAmount }}
                    </td>
                {% else %}
                    <td data-value="0">
                        {{ 0|formatAmount }}
                    </td>
                {% endif %}
            {% endfor %}
            <td data-value="{{ report.income[category.id].sum }}">
                {{ report.income[category.id].sum|formatAmount }}
            </td>
            <td data-value="{{ report.expense[category.id].sum }}">
                {{ report.expense[category.id].sum|formatAmount }}
            </td>
        </tr>
    {% endif %}
    {% endfor %}
    </tbody>
</table>