How to add numbers

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# 8  
[...] I assume same command will give me total in Gigabytes if the all the size in Megabytes.
No, it converts the values reported in MB to KB and at the end it outputs in MB. If you want to get the size in GB just change the code like this:
awk 'END{print s/1024/1024"G"}{s+=$NF~/M/?($NF*1024):$NF}' file

awk 'END{printf "%.2fG\n", s/1024/1024}{s+=$NF~/M/?($NF*1024):$NF}' file

# 9  
thank you again redoule for clearing this out for me. Smilie

You're absolutly correct code is working very fine for me.

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