diff --git a/openshift_metrics/merge.py b/openshift_metrics/merge.py
index 4790798..8bc4e8c 100644
--- a/openshift_metrics/merge.py
+++ b/openshift_metrics/merge.py
@@ -35,7 +35,14 @@ def main():
     """Reads the metrics from files and generates the reports"""
     parser = argparse.ArgumentParser()
     parser.add_argument("files", nargs="+")
-    parser.add_argument("--output-file")
+    parser.add_argument(
+        "--invoice-file",
+        help = "Name of the invoice file. Defaults to NERC OpenShift <report_month>.csv"
+    )
+    parser.add_argument(
+        "--pod-report-file",
+        help = "Name of the pod report file. Defaults to Pod NERC OpenShift <report_month>.csv"
+    )
     parser.add_argument(
         "--upload-to-s3",
         action="store_true"
@@ -49,11 +56,6 @@ def main():
 
     args = parser.parse_args()
     files = args.files
-
-    if args.output_file:
-        output_file = args.output_file
-    else:
-        output_file = f"{datetime.today().strftime('%Y-%m-%d')}.csv"
     ignore_hours = args.ignore_hours
 
     report_start_date = None
@@ -89,6 +91,16 @@ def main():
 
     report_month = datetime.strftime(report_start_date, "%Y-%m")
 
+    if args.invoice_file:
+        invoice_file = args.invoice_file
+    else:
+        invoice_file = f"NERC OpenShift {report_month}.csv"
+
+    if args.pod_report_file:
+        pod_report_file = args.pod_report_file
+    else:
+        pod_report_file = f"Pod NERC OpenShift {report_month}.csv"
+
     if report_start_date.month != report_end_date.month:
         print("Warning: The report spans multiple months")
         report_month += " to " + datetime.strftime(report_end_date, "%Y-%m")
@@ -98,30 +110,30 @@ def main():
     )
     utils.write_metrics_by_namespace(
         condensed_metrics_dict,
-        output_file,
+        invoice_file,
         report_month,
         ignore_hours,
     )
-    utils.write_metrics_by_pod(condensed_metrics_dict, "pod-" + output_file, ignore_hours)
+    utils.write_metrics_by_pod(condensed_metrics_dict, pod_report_file, ignore_hours)
 
     if args.upload_to_s3:
         primary_location = (
             f"Invoices/{report_month}/"
             f"Service Invoices/NERC OpenShift {report_month}.csv"
         )
-        utils.upload_to_s3(output_file, "nerc-invoicing", primary_location)
+        utils.upload_to_s3(invoice_file, "nerc-invoicing", primary_location)
 
         timestamp = datetime.utcnow().strftime('%Y%m%dT%H%M%SZ')
         secondary_location = (
             f"Invoices/{report_month}/"
             f"Archive/NERC OpenShift {report_month} {timestamp}.csv"
         )
-        utils.upload_to_s3(output_file, "nerc-invoicing", secondary_location)
-        pod_report = (
+        utils.upload_to_s3(invoice_file, "nerc-invoicing", secondary_location)
+        pod_report_location = (
             f"Invoices/{report_month}/"
             f"Archive/Pod-NERC OpenShift {report_month} {timestamp}.csv"
         )
-        utils.upload_to_s3("pod-" + output_file, "nerc-invoicing", pod_report)
+        utils.upload_to_s3(pod_report_file, "nerc-invoicing", pod_report_location)
 
 if __name__ == "__main__":
     main()
diff --git a/openshift_metrics/openshift_prometheus_metrics.py b/openshift_metrics/openshift_prometheus_metrics.py
index 4183839..f4c31df 100755
--- a/openshift_metrics/openshift_prometheus_metrics.py
+++ b/openshift_metrics/openshift_prometheus_metrics.py
@@ -103,18 +103,17 @@ def main():
         pass
 
     month_year = datetime.strptime(report_start_date, "%Y-%m-%d").strftime("%Y-%m")
-    directory_name = f"data_{month_year}"
 
-    if not os.path.exists(directory_name):
-        os.makedirs(directory_name)
-
-    output_file = os.path.join(directory_name, output_file)
+    if report_start_date == report_end_date:
+        s3_location = f"data_{month_year}/metrics-{report_start_date}.json"
+    else:
+        s3_location = f"data_{month_year}/metrics-{report_start_date}-to-{report_end_date}.json"
 
     with open(output_file, "w") as file:
         json.dump(metrics_dict, file)
 
     if args.upload_to_s3:
-        utils.upload_to_s3(output_file, "openshift-metrics", output_file)
+        utils.upload_to_s3(output_file, "openshift-metrics", s3_location)
 
 
 if __name__ == "__main__":