I have a table that essentially contains timesheet data.

- Date

- Available hours

- Billable hours

- Sick hours

- Annual Leave Hours

etc

The current version of my formula calculating effective utilisation is

sum("available hours")/(sum("billable hours"-sum("sick hours")-sum("annual leave hours"))

But I'm getting a null result.

I'm wondering if there is a way I can sum the results of aggregations.

Thanks.