Displaying values of a Pivot Table Filter in a cell

[XL_User44]

I am graphing weekly data in a Pivot Chart over a range of time. The time values aren't stored as dates but names like "14wk01" or "14wk37". Right now the time filter selects multiple items to display so I can see data over time. My ultimate goal would be to include the beginning and end time value into the Title of my chart which I can do if I can display the start time value in a cell and the end time value in another cell. How do I display the first item selected in a multiple items selected filter and the last item selected in a multiple items selected filter each into their own individual cells?

Thanks