How are you trying to get the Total Price in the subreport?  Here's something you can try for getting the information to the main report:

1.  Create two formulas that will each initialize a variable.  I'll call these mailto:%7b@GrandTotalInit - {@GrandTotalInit } and mailto:%7b@GroupTotalInit - {@GroupTotalInit }.

    mailto:%7b@GrandTotalInit - {@GrandTotalInit }
    Shared Numbervar GrandTotal := 0;
   
    mailto:%7b@GroupTotalInit - {@GroupTotalInit }
    Global Numbervar GroupTotal := 0;

Note the ":=" - You need to use this syntax to assign a value to a variable.  Also, but putting the ";" at the end, this value won't actually display on the report, but the formula will evaluate to set the initial value.

"Shared" means the variable will only be available in the main report, "Global" means it's available in both the main report and the sub-report.

2.  Place mailto:%7b@GrandTotalInit - {@GrandTotalInit } in a report header section in the main report.

3.  Assuming that you're grouping data in the main report, put this formula in a group header section above the section where the subreport runs but at the same group level.  This will set the variable to 0 at the start of each group.

4.  In the subreport, create a formula that will be used to sum the total price.  I'll call this mailto:%7b@TotalPrice - {@TotalPrice }:

    Global Numbervar GroupTotal;
    GroupTotal := sum({myTable.TotalPrice});
    GrandTotal 
   
Note that the last line has no ";" on the end - this will display the value of the variable.

5.  Put this formula in a report footer of your subreport.  This will then display at the end of the subreport.

6.  In the main report, create another formula that will sum the values returned from the subreports.  I'll call this mailto:%7b@TotalAdd - {@TotalAdd }:

    Global Numbervar GroupTotal;
    Shared Numbervar GrandTotal;
    GrandTotal := GrandTotal + GroupTotal;
   
7.  Place this variable in a group footer section below the subreport and at the same group level as the subreport.

8.  Create a final formula which I'll call mailto:%7b@GrandTotalShow - {@GrandTotalShow }:
   
    Shared Numbervar GrandTotal;
    GrandTotal
   
9.  Place this formula in either a report footer section or, if you have multiple groups in the main report, the footer section of a group that is outside of the group where the subreport is located.

-Dell   

If each detail line is a subreport, you won't get your grand total by putting it in the subreport footer - it has to go in the main report footer. 

I get an error that says the "GroupTotal+{mytable.TotalPrice}" needs to be a number.  {mytable.TotalPrice} is currency, do I have to first convert it to a number??

The subreport is showing the running total but the main report is showing 0.  I went back and checked all the instructions that you gave me and they were all followed and typed correctly.  The only thing I did diffrently is where I put some of the formulas.  I do not have any groups in the main report.  I put GrandTotalInit and GroupTotalInit in the report header section and i put TotalAddin in detail section C - the section under my where my subreport is.  And GrandTotalShow is in the report footer.