Aging report

Using the schema below (SQLite), write one query that produces an accounts-receivable aging report as of 2026-09-30: one row per client with columns client_name, current, days_1_30, days_31_60, days_61_90, days_over_90, total_outstanding. Outstanding is invoice total minus payments received on or before the as-of date, for invoices with status 'sent'. Bucket by days past due_on relative to the as-of date. Include clients with zero outstanding as zero rows. Order by total_outstanding descending then client_name. Amounts in dollars with two decimals. Return only the SQL in one code block.