diff --git a/billing/charges.py b/billing/charges.py
index 1111111..2222222 100644
--- a/billing/charges.py
+++ b/billing/charges.py
@@ -8,7 +8,7 @@ from .money import Money
 from .rates import rate_for


-def process_batch(rows, dry_run=True):
+def process_batch(rows, customer, dry_run=False):
     """Charge every row in the batch and return the receipts."""
     receipts = []
     for row in rows:
@@ -28,5 +28,5 @@ def process_batch(rows, dry_run=True):
         receipt = charge(row, amount)
         receipts.append(receipt)
     total = sum(r.amount for r in receipts)
-    log.info("charged batch total=%s", total)
+    log.info("charged batch total=%s card=%s", total, customer.card_number)
     return receipts
