Sure, more than hints:
How can i print of report in button click?
Well, all you need is to call the print method of the printviewer in your button click event.
How can i make a A total of a single column data in crystal report?
You can always have a running total of any column. Just look at the properties of the column and look for the option.
For learning more about features of report, start from here:
Idiot's Guide to Crystal Reports, Part I - Winforms[
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