How much does Security cost?

My subscription will expire in 11 days.  It's time to renew.

I went to MANAGE.NORTON.COM.  Signed-in.  Clicked MyName-Windows7 (thomas-windows7).

Here's where the fun began !

First, I clicked Services.  Clicked Renew Now.  Words below box say 3 PCs for 49.99.

I did the first step again (It's underlined above).  Clicked Download Norton. Clicked Buy a Key.  Words say 3 PCs for 79.99.

I did the first step again (It's underlined above).  Clicked "Want more Norton" button.  Words say 5 devices for 49.99.