I would greatly appreciate any help in performing a field update of Deal Name (I changed Deals to Opportunities) to a concatenated string of Custom Deal Fields or a singular Custom Deal Field comprised of such Custom Deal Fields like below.

Concat(${Opportunities.Opportunity Brand},'-',${Opportunities.Account Name},'-',${Opportunities.Opportunity Number})

When I tried to perform a workflow field update as depicted below the formula is coming through as text and not being evaluated as a formula in the Field Updates.

Please help!!!

Thanks In Advance