[hotfix] fix null issue in budget variance
diff --git a/accounts/report/budget_variance_report/budget_variance_report.py b/accounts/report/budget_variance_report/budget_variance_report.py
index 2cbbd62..a5860c8 100644
--- a/accounts/report/budget_variance_report/budget_variance_report.py
+++ b/accounts/report/budget_variance_report/budget_variance_report.py
@@ -121,6 +121,6 @@
 			
 			for ad in actual_details.get(ccd.name, {}).get(ccd.account, []):
 				if ad.month_name == month:
-						tav_dict.actual += ad.debit - ad.credit
+						tav_dict.actual += flt(ad.debit) - flt(ad.credit)
 						
-	return cam_map
\ No newline at end of file
+	return cam_map