Calculated field based on subreport ... AGAIN

I thought this was working correctly, but it's not.  I'm having difficulty getting a field from my subreport and using it in a formula in my main report.

In my subreport, I have a formula called Subreporttotal in the Group Footer #1, that is :
WhilePrintingRecords;
Shared NumberVar SubreportTotal;
SubreportTotal := Sum({Command.ext_recvd}, {Command.vendor_id});

In my main report I have formula called SharedNumberVar that is in the report header that is:
WhilePrintingRecords;
Shared NumberVar SubreportTotal;

In my main report, I have a formula called Impact %, that is in the Group Footer #1 @ Vendor - A section that is:
WhilePrintingRecords;
Shared NumberVar SubreportTotal;
If SubreportTotal = 0 then
    0
Else
    Sum ({@Total NC Cost}, {@Vendor}) / SubreportTotal


When I run the report, I get zeros everywhere and I can't figure out what I have done wrong.
Vendor-Issues---Summary.rpt
Vendor-Spend-Subreport.rpt
Vendor-Name-Subreport.rpt
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ITworksAsked:
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mlmccCommented:
I found 3 issues with your implementation

1.  You didn't have a formula in the subreport that assigned a value to the shared variable.

2.  You are calculating a % but you weren't displaying any decimals so all values were rounding down to 0.  ALso since it is a % the formula needed to be multiplied by 100.

3.  Subreports are the last object evaluated in a section.  Since your formula relies on a value returned from the subreport it needs to be in a section after the subreport.  I added a GF1b and put the formula there.  To make it look like it is on the same line as the rest I set GF1a to underlay the following section.

I also changed the formula in the report header so it declares the shared variable but doesn't show any values.

The attached report has my changes.  I couldn't save it with data since apparently there is more data than was saved with it.

mlmcc
Vendor-Issues---SummaryRevA.rpt
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ITworksAuthor Commented:
Thanks so much!  I will add all of your help to my 'help file' for future reference.   This was my first report with variables.....I learned a lot from you.
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