How much am I paying for BigQuery time travel and fail-safe?

-- active_physical_bytes already includes the time-travel bytes, so the
-- live data is active minus time travel, plus long-term.
SELECT
  table_schema,
  table_name,
  ROUND((active_physical_bytes - time_travel_physical_bytes
         + long_term_physical_bytes) / POW(1024, 3), 2)      AS live_physical_gib,
  ROUND(time_travel_physical_bytes / POW(1024, 3), 2)        AS time_travel_gib,
  ROUND(fail_safe_physical_bytes   / POW(1024, 3), 2)        AS fail_safe_gib,
  ROUND(SAFE_DIVIDE(
    time_travel_physical_bytes + fail_safe_physical_bytes,
    NULLIF(active_physical_bytes - time_travel_physical_bytes
           + long_term_physical_bytes, 0)), 2)               AS overhead_ratio
FROM `region-us`.INFORMATION_SCHEMA.TABLE_STORAGE
WHERE NOT deleted
  AND time_travel_physical_bytes > 0
ORDER BY time_travel_physical_bytes DESC
LIMIT 100;