For starters don't get me wrong, when I play my game I do visit the stores and buy stuff, especially when I go on vacations (World Adventure). But when it comes to working on my story and seeing the game change the clerks in my studio like 3 times already, plus the fact that you cannot make them pose, not even with the Pose Player Addon, I say punk clerk be gone!
Because it is made for community shops you will find it in the Community Objects, however if you would like to have a 'home sale' then you can use Buzzler's fantastic Build/Buy Restriction Choker mod. It will enable all community items on your lot and all residential items on community lots when you buy/build.
I take no credit at all for the mesh, I 'only' spent time making them base game compatible. They will act as any decorative item in your game.
The three registers I converted have three recolorable areas and you can customize them.
They are all available as both .sims3pack and .package format, chose the one you want to install (see below post if you do not know how).
General cash register from World adventure (item says book register, they look the same)
Consignment cash register from Supernatural
Potions cash register from Supernatural
General Cash register
Consignment Cash register
Potions Cash register
The three registers in one file
If you would like to see more decorative registers I made, check out ATS's ones and visit her page if you haven't done so, she has amazing downloads!
Hair: Anubis360, EA, Newsea
Decor: My clothe store and a random yard sale I set up in my garden
CC in them: Angela, ATS3, EA, Pocci, Severinka, Simcredible, Ung999, WOE
(sorry if I forgot some, let me know and I will add it)