Sum of estimates in scrum board backlog

[Gabriel Radic]

I'm trying to Abacus to get these features:

• Sub-task calculation and rollup to parent.

Cab Abacus do the calculation update the Parent issue built-in Estimated Time field, so it's visible in the Backlog board?

Alternatively, we could (mis)use the Story points field to do the same, as it's a numerical field. 

Thanks. 

[Gabriel Radic · Accepted solution]

Answering my own question. In the Abacus interface, it says:

At minimum two custom fields of type Numeric, Text, Radio button or Single select. One of the fields should be of type Text or Numeric to store the results.

So no luck using the Abacus to update the built-in Estimation fields.

[Vincent Mutambuki { Mumo Systems }]

Actually Abacus has been doing this for a long time. You can roll up subtask to parent issue and Story to Epic for numeric and duration calculations.