use is_disabled for carts with total=0
use is_disabled for carts with total=0

jrief/django-shop-stripe,jrief/django-shop-stripe,jrief/djangoshop-stripe,jrief/djangoshop-stripe,awesto/djangoshop-stripe,jrief/django-shop-stripe,jrief/djangoshop-stripe,awesto/djangoshop-stripe,awesto/djangoshop-stripe