Hi Jim,
Nice to meet you! My name is Randy and I'm an independent advisor.
In Windows Media Player, try this, open your playlist in Library view and switch to Details view (right-click the column headers and tick Length or Total Time) so the runtime displays, if you don’t see the overall total, press Ctrl+M to show the classic menu, then enable the Status Bar under View this bar at the bottom will show the number of items and the total play time for your playlist.
Kind regards,