Hello,

I have a form called “Projects” which contains a subform called “Invoices”. In the subform I have a field called “Amount”.

On the main form I have a field called “Total Cost”. When adding, editing or deleting records in the subform I need the Total Cost to auto sum the “Amount” column in the subform.

 Could you tell me step by step how to do this?

 

Your help is greatly appreciated :)