Find most current date an item was cycle counted...

Sorry for this exceedingly basic question, but I am trying to report cycle count data for our auditors.   They only want to see the most recent cycle count on each item.   So how do I tell PowerBI to only report lines with the most recent Posting Date for each item?

So my table would look like:

Item number        Posting Date         Physical Count

12071                   11/22/2016           10,537

12071                   11/30/2016            9.725

The table has several items that have multiple lines because of being counted more than once within the reporting time period.   I want the final report to only show, in this case, the second line.

This is probably PowerBI 101, but I can't seem to find anything on the web on how to set this up and my brain is just misfiring when thinking about this one.

Thank you for any assistance you can provide.