A time study was carried out for a job broken into two elements. For each element, three iterations of task were observed, and observed time was recorded. The observed times (in seconds) and the rating factor for each element are given in the table.
| Work element | Observed time (seconds) | Rating factor |
|---|
| A | 20; 25; 21 | 105% |
| B | 19; 17; 18 | 90% |
If a further 20% needs to be added for allowances, then the standard output of the worker is ______ units per hour (in integer).