fix w kalkulacji last price

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")}