diff --git a/app/__init__.py b/app/__init__.py
index 093a92d..9b2496d 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -5,6 +5,7 @@ from pathlib import Path
 from .extensions import db, login_manager
 from .models import User, AppSetting
 from .config import Config
+from .domain.costs import calculate_net_price_costs
 
 THEMES = {name: {} for name in ("bootstrap", "flatly", "darkly", "pulse")}