# Notes & FAQ on Cost Reports

## Reports[​](#reports "Direct link to Reports")

### Timeframe: last 30 days[​](#timeframe-last-30-days "Direct link to Timeframe: last 30 days")

When selecting a timeframe of "Last 30 days", the actual timeframe might be between 28 and 31 days. The current day of last month will be selected, resulting in a few days difference depending on the current month.

## Exports[​](#exports "Direct link to Exports")

### Difference between `booking_end_date` and `booking_end_iso`[​](#difference-between-booking_end_date-and-booking_end_iso "Direct link to difference-between-booking_end_date-and-booking_end_iso")

For *full-day bookings only*, a difference between `booking_end_date` and `booking_end_iso` like below is **normal and to be expected**.

| booking\_end\_date | booking\_end\_iso   |
| ------------------ | ------------------- |
| 2024-07-13         | 2024-07-14T00:00:00 |

The reason being a difference in calculation of timeframes between how humans perceive and talk about time and how calendars work.

While we *talk* about a time frame of two days when we say from **March 1st** until **March 2nd**, a calendar registers the same time frame as `2024-03-01T00:00:00` (start of day, March 1st) until `2024-03-03T00:00:00` (start of day, March 3rd).