Summary with No Summary Part

Hi Group,

I have a simple layout with a Header, Body & Footer. It also has 1
Summary Part.

Everything works as expected for the records that have more than 1 Id.
They are listed in the Body Part with a total (of the appropriate
fields) listed in the Summary part. What I would like to do is to
eliminate the Summary Part if only 1 record is found for a particular
Id.

Suggestions more than welcome,

Thank you.