For rounding, you need to use the settings in the document template
[#2] - for example, for order amount
[ordersumm[#2]] - thus the document will indicate rounding to 2 characters
For the price of the product will work the same way.
If you need to round the value in the process product table itself. Then in the table setting (in the interface)
there is a rounding function
http://i.imgur.com/ECP35a9.pngRounding in the process does not affect the rounding in the document template and is configured separately from each other.