Sorry, the MEPage was just to have something different show up. So, it would have shown up as MEPage 1 or Page 2 (or vice versa, I can't remember).
Anyway,
To do what you want, you could get away with using only one textbox, but it will take extra coding to set the location. So, the easiest is just to put two textboxes, one in each location that they should show up on the page. And set the one on the left to:
=IIf([Page] Mod 2=0,"","call us at 888-999-9999" & " - Page " & [Page])
And the one on the right side to:
=IIf([Page] Mod 2>0,"","for best prices" & " Page " & [Page])