Bill,
Thank you for your continued help. If we keep up this dialog, I will hit the 10 posts requirement for showing you all a photo! And once I can show you a photo, I'm sure it will all become clear! Looking at the sprocket cluster, or cassette, I find no markings at all. There are 8 sprockets. Smallest one has 13 cogs, and the largest one has 28 cogs.The derailleur has the markings "Shimano Tourney TX"

Maddog34,
Thank you too for your help.