diff --git a/config/settings/base.py b/config/settings/base.py
index e84e3bd..96df0ee 100644
--- a/config/settings/base.py
+++ b/config/settings/base.py
@@ -66,7 +66,10 @@ MIDDLEWARE = DJANGO_MIDDLEWARE + PROJECT_MIDDLEWARE
 
 if DEBUG:
     INSTALLED_APPS += ["silk"]
-    MIDDLEWARE += ["silk.middleware.SilkyMiddleware", "django_browser_reload.middleware.BrowserReloadMiddleware",]
+    MIDDLEWARE += [
+        "silk.middleware.SilkyMiddleware",
+        "django_browser_reload.middleware.BrowserReloadMiddleware",
+    ]
 
 ROOT_URLCONF = "config.urls"
 
diff --git a/config/urls.py b/config/urls.py
index e1ce1f6..1e1dc25 100644
--- a/config/urls.py
+++ b/config/urls.py
@@ -16,4 +16,7 @@ urlpatterns = [
 if settings.DEBUG:
     urlpatterns.append(path("__debug__/", include(debug_toolbar.urls)))
     urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
-    urlpatterns += [path("silk/", include("silk.urls")), path("__reload__/", include("django_browser_reload.urls")),]
+    urlpatterns += [
+        path("silk/", include("silk.urls")),
+        path("__reload__/", include("django_browser_reload.urls")),
+    ]
diff --git a/shop/models.py b/shop/models.py
index 4d056a8..dd2b953 100644
--- a/shop/models.py
+++ b/shop/models.py
@@ -450,7 +450,7 @@ class Order(TimestampedModel):
     class Meta:
         verbose_name = _("pedido")
         verbose_name_plural = _("pedidos")
-        ordering = ("creation_date", )
+        ordering = ("creation_date",)
 
 
 class Cart(models.Model):
diff --git a/web/views/components.py b/web/views/components.py
index 028896f..2f95763 100644
--- a/web/views/components.py
+++ b/web/views/components.py
@@ -87,7 +87,9 @@ def cart(request, *args, **kwargs):
     for item in items:
         price = ProductPrice.objects.filter(product=item.product, current=True).first()
         base_total += price.price * item.quantity
-        tax_total += round(price.price * Decimal(price.tax.value / 100), 2)
+        tax_total += round(
+            price.price * Decimal(price.tax.value / 100) * item.quantity, 2
+        )
 
     total = base_total + tax_total
 
diff --git a/web/views/web.py b/web/views/web.py
index 44f85aa..fcda7e2 100644
--- a/web/views/web.py
+++ b/web/views/web.py
@@ -166,8 +166,10 @@ class OrderDetail(TemplateView):
             order=order,
             product__is_shipping_method=False,
         ).aggregate(amount=Sum("taxes")).get("amount") or Decimal("0")
+        settings = WebSettings.load()
 
         return {
+            "web_title": settings.web_title,
             "order": order,
             "items": items,
             "signature_version": parameters.get("Ds_SignatureVersion"),
@@ -197,7 +199,9 @@ class OrdersView(TemplateView, FilteredQuerysetMixin, PaginatedQuerysetMixin):
     template_name = "web/orders.html"
 
     def get_queryset(self):
-        return Order.objects.filter(user=self.request.user).exclude(status=Order.Statuses.STATUS_PENDING)
+        return Order.objects.filter(user=self.request.user).exclude(
+            status=Order.Statuses.STATUS_PENDING
+        )
 
     def get_context_data(self, **kwargs):
         settings = WebSettings.load()