3.17.3 Can you answer these questions?

Can you answer these?

3.17.3.1 Unable to truncate total sum of a row in longtable

https://tex.stackexchange.com/questions/370360/unable-to-truncate-total-sum-of-a-row-in-longtable

I was able to truncate the last row using \DTLtrunc command but this command is not working for last column to truncate the number, here is my MWE. 
\documentclass[10pt,a4paper,landscape]{article} 
...
 

- asked by Biki Teron 1vote

3.17.3.2 Business letterhead

https://tex.stackexchange.com/questions/370363/business-letterhead

I'm new to LaTeX but I'm now able to create basic but nice-looking documents. I want to make LaTeX my only document-processing software, and would want to produce my company's letterhead. Can someone  ...
                                                                                  

                                                                                  
 

- asked by Mohamed Sumyla Kamara 1vote

3.17.3.3 Text wrapping around truly floating content

https://tex.stackexchange.com/questions/369347/text-wrapping-around-truly-floating-content

I've read a lot about the wrapfig package (and some others, like picinpar, picins), but I wonder if there's any possibility to have text wrapping around floating content that gets automatically  ...
 

- asked by Torsten Crass 6votes

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