diff --git a/simba/costs.py b/simba/costs.py
index f04cd85..5d1a998 100644
--- a/simba/costs.py
+++ b/simba/costs.py
@@ -325,7 +325,8 @@ def set_electricity_costs(self):
             default_cost_strategy = vars(self.args)["strategy_" + station.get("type")]
 
             cost_strategy_name = "cost_calculation_strategy_" + station.get("type")
-            cost_calculation_strategy = vars(self.args).get(cost_strategy_name) or default_cost_strategy
+            cost_calculation_strategy = (vars(self.args).get(cost_strategy_name)
+                                         or default_cost_strategy)
 
             # calculate costs for electricity
             try: