How can I compare the value of an aggregate with a list of results from a model

my view:
def comprar(request):
if request.method == 'POST':
form = FormComprar(request.POST)
if form.is_valid():
form = form.save()
retorno = 'Intenção de compra computada.'
form = FormComprar()
else:
form = FormComprar()
total =
Compra.objects.all().aggregate(quantidade_total=Sum('quantidade'))
[ 1 ]
valores = Valor.objects.all().order_by('quantidade') [ 2 ]
return render_to_response(
'form_compra.html',
locals(),
context_instance=RequestContext(request))


template - form_compra.html

Aggregate
{{ total.quantidade_total }} [ 1 ]

{% for valor in valores %}
{{ valor.quantidade }}
{% endfor %}
list os results [ 2 ]
e.g
1000
2000
3000

like a :

{% if total.quantidade_total >= {{ valor.quantidade }}

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