О докладе частое и вложенных отчетов

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i use devexpress 
I created a project using C Sharp
I do  put Gridcontrol whose data source is a query statment
Then I added a column containing the math equation
I used the report generation tool to create the report
Unfortunately, the data for the last column that contains the mathematical equation did not appear (2nd screen)

Also I'm having trouble creating a subreport within a report (3rd screen)

this link for my poject
<a href="https://drive.google.com/file/d/1Kw-DIVTCqxXrafKzbRcVn4p3N5cUbcep/view?usp=sharing">Meet Google Drive – One place for all your files</a>[<a href="https://drive.google.com/file/d/1Kw-DIVTCqxXrafKzbRcVn4p3N5cUbcep/view?usp=sharing" target="_blank" title="New Window">^</a>]

Что я уже пробовал:

отчет.источник данных = gridcontrol.источник данных;

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