{% blocktrans trimmed with price=object.unit_price quantity=object.quantity %}
This line ends the day before the new terms apply, and a new line with the new unit price or quantity
replaces it from that day. Current terms: quantity {{ quantity }} at {{ price }}.
{% endblocktrans %}
{% if last_invoiced_date %}
{% blocktrans trimmed with date=last_invoiced_date|date:"Y-m-d" %}
The last invoiced period ends on {{ date }}: the new terms must start after it.
{% endblocktrans %}
{% endif %}