Simple Tableau usage

Got a message saying I may be going over my  mobile minutes usage. I downloaded a file containing all the the voice calls records from Verizon. Now, I was curious of how many minutes I went over my allowance. Tableau to the rescue!
Load the data in Tableau and in less than a minute I got my answers!
** I did not update the "null" values on purpose.

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short cuts do not work some times...

Got a new macbook.  Using it to connect to my desktop at work which is windows. My desktop at work connects to various linux servers.

Now my shortcuts in the linux window are messed up..

The variety of operating systems is taking a toll!