Feature Request: Custom Views

Feature Request: Custom Views

When creating a custom view of data I would love to be able to 'SUM' a custom field, similar to the way it can be done in Creator.

The business case for this is to present the view on the homepage with a 'sum' or total for a numerical field e.g. TOTAL for ALL INVOICES, or TOTAL for CUSTOM_FIELD.

Is this possible?