Displaying multiple models on one template - django

Question

I have a template which displays a master detail form represented by a formset object. That part is working fine. I have a second detail model which is read-only that I would like to display on the same template as the master-detail form.
My view:
def order_edit(request, pk):
order = get_object_or_404(Orders, pk=pk)
if request.method == "POST":
form = OrderForm(request.POST, instance=order)
if form.is_valid():
order = form.save(commit=False)
lineitem_formset = LineFormSet(request.POST, instance=order)
if lineitem_formset.is_valid():
order.save()
lineitem_formset.save()
#order.date_ordered = timezone.now()
#order.save()
return redirect('order_list')
else:
form = OrderForm(instance=order)
#lineitem_formset = LineFormSet(instance=Orders()) This was wrong. It was calling a new instance of Orders which was blank
lineitem_formset = LineFormSet(instance=order)
modification_formset = ModificationFormSet(instance=order)
return render(request, "orders/order_edit.html", {"form": form, "lineitem_formset": lineitem_formset,"modification_formset": modification_formset })
I have read a number of posts on this topic but cannot seem to make sense of rendering the third model on my template. Here are my models.
class LineitemInfo(models.Model):
order = models.ForeignKey('Orders')
line_item_num = models.CharField(max_length=20)
item_description = models.CharField(max_length=1020, blank=True, null=True)
quantity = models.FloatField(blank=True, null=True)
unit = models.CharField(max_length=20, blank=True, null=True)
unit_price = models.FloatField(blank=True, null=True)
line_account_code = models.CharField(max_length=260, blank=True, null=True)
options = models.CharField(max_length=30, blank=True, null=True)
option_num = models.CharField(max_length=8, blank=True, null=True)
class Meta:
unique_together = (('order', 'line_item_num'),)
class Orders(models.Model):
pr_num = models.CharField(max_length=80, blank=True, null=True)
po_num = models.CharField(max_length=56, blank=True, null=True)
task_order_num = models.CharField(max_length=40, blank=True, null=True)
credit_card_id = models.CharField(max_length=40, blank=True, null=True)
date_ordered = models.DateField(blank=True, null=True)
vendor_name = models.CharField(max_length=200, blank=True, null=True)
order_description = models.CharField(max_length=400, blank=True, null=True)
predicted_order_total = models.DecimalField(max_digits=20, decimal_places=2, blank=True, null=True)
requestor = models.CharField(max_length=120, blank=True, null=True)
class Modifications(models.Model):
order = models.ForeignKey('Orders', editable=False)
mod_num = models.CharField(max_length=40, blank=True, null=True, editable=False)
mod_date = models.DateField(blank=True, null=True, editable=False)
mod_amount = models.IntegerField(blank=True, null=True, editable=False)
mod_description = models.CharField(max_length=400, blank=True, null=True, editable=False)
mod_performenddate = models.DateField(blank=True, null=True, editable=False)
optionyear = models.IntegerField(blank=True, null=True, editable=False)
class Meta:
unique_together = (('order', 'mod_num'),)
It is the third model that I am trying to render on the template. The first two are rendered as part of a formset. TIA.