os.chdir(r"S:\MIS\SAP consumption data\result")

selected_columns = [
    "Account Number",
    "Premise",
    "Service Address",
    "Meter Number",
    "Doc Amount in $",
    "Usage in TGals",
    "Billing Date",
    "Due Date",
    "Rate Category",
]

merge_to_csv(
    selected_columns=selected_columns,
    file_name=f"Jan*.csv",
    top_rows=10_000_000,
    output_file="_output",
)