If a custom field is a number or a formula, I'd like to be able to sum the entire column. For examp. We have one column that multiplies the time tracked by the value per hour (ie. 100/hr) and the column then calculates the total. (ie. 10 hrs x 100/hr = 1000) If we have 15 task we'd like to sum the entire column so we know what the total value is for all 15 task.

Use case scenario for e.g. Invoices

Invoice Amount (Manual)

VAT Rate (Manual or Single Select %)

VAT Value (Automatically Calculated [VAT Rate] * [Amount])

Total Invoice Amount (Automatically Calculated [Amount]+[VAT Value])

Total Invoice Amount could be rolled-up to give you a total of all invoices issued.

If you also have a Checkbox for Paid/Unpaid and use it to Filter, you could have an overview of Pending Invoices.

The amounts under the subtasks should be summed up and the result will be displayed under the task row. This is essential in liquidations and budgeting.

I would really appreciate a permanent field for list formula column calculations. Each of our projects is a list with discrete tasks. At present, it is impossible for us to get a quick over-all view of the time spent as compared to the retainer we received. There are probably many different ways to arrange this, but column calculations for Lists that would enable us to set up a formula [(time tracked x hourly rate) - retainer amount] would be a start.

Thank you very much and keep up with the great work