It am trying to Group Summarize my {Price.field} when the {Shipdate.field} has a date in it other wise I want it to ignore that line itemand Sum only the ones that do. Below is what I have attempted to use for the formula. Can anyone please assist me in this.

IF ISNULL({VIEW_OrderDetails.ShippedDate}) then
{VIEW_OrderDetails.Price}

I am getting a blank result and if I use this formula it only gives me the item without a date in the Sum field.

IF NOT ISNULL({VIEW_OrderDetails.ShippedDate}) then
{VIEW_OrderDetails.Price}

I have tried that but how do evaluate if the ship date is not null?? I put the Shipdate field in the "On change of field" Box under Evaluate but how will it know to ignore the NULL fields?

you can use isdate(shippedDate) as well

That does work fine, My problem is that I had my grouping creating the main issue. Thanks for the help.