diff --git a/backtester/backtester.py b/backtester/backtester.py
index 4092579..edf82ff 100644
--- a/backtester/backtester.py
+++ b/backtester/backtester.py
@@ -201,10 +201,10 @@ class Backtest:
                     trade_log_append = self._options_inventory.iloc[i].copy()
                     trade_log_append['totals', 'qty'] = qty_to_sell
                     trade_log_append['totals', 'date'] = date
-                    trade_log_append['totals', 'cost'] *= -1
-                    for leg in self._options_strategy.legs:
+                    trade_log_append['totals', 'cost'] = contract_per_row
+                    for j, leg in enumerate(self._options_strategy.legs):
                         trade_log_append[leg.name, 'order'] = ~trade_log_append[leg.name, 'order']
-                        trade_log_append[leg.name, 'cost'] *= -1
+                        trade_log_append[leg.name, 'cost'] = options_value[j].iloc[i]['cost']
                     self.trade_log = self.trade_log.append(trade_log_append, ignore_index=True)
                     self._options_inventory.at[i, ('totals', 'date')] = date
                     self._options_inventory.at[i, ('totals', 'qty')] += qty_to_sell