I decided to do an updated version of More Retail Employees by Archieonic as so many people seem to like it and it hasn't been updated for some time.

I have included 2 versions: one regular, and one compatible with LMS's Retail Overhaul mod, each having reduced perk point costs as detailed below. Install ONLY ONE VERSION. If you are using LMS's Retail Overhaul mod, ensure my mod is in the SAME FOLDER as their files, or it won't work.

PURPOSE:
This mod enables hiring up to 8 additional retail employees using retail perk points.

THIS MOD WILL CONFLICT WITH OTHER MODS THAT CHANGE THESE FILES:
7DF2169C!00000003!00000000000218F1.businessemployee_Retail.SnippetTuning.
EC3DA10E!00000003!000000000001B6CB.retailPerks_AdditionalWorker_1.BucksPerkTuning
EC3DA10E!00000003!000000000001B6CC.retailPerks_AdditionalWorker_2.BucksPerkTuning

PERK POINT COSTS PER ADDITIONAL EMPLOYEE:
#1 - 100 PTS
#2 - 200 PTS
#3 - 300 PTS
#4 - 400 PTS
#5 - 500 PTS
#6 - 600 PTS
#7 - 700 PTS
#8 - 800 PTS

ORIGINAL EMPLOYEE HIRING INFO:
ADDITIONAL EMPLOYEE #1 - 350 PTS
ADDITIONAL EMPLOYEE #2 - 1200 PTS

NOTES FROM ORIGINAL MOD THAT MAY HELP YOUR GAMEPLAY EXPERIENCE USING THIS MOD:
I do not recommend this mod as a standalone (purely because more employees that just chat are useless) for retail to work properly I recommend you also get the following mods:

-Shimrod101 Less 'Musical Chairs', No Group Chat mod. LittleMsSam updated this, go to post #184 for the No Group Chat version, this prevents employees from getting entangled in group conversations that slow them down. Mind you, this will remove group chats completely from the game too.

-More Customers by weerbesu (this already has a 20 sims per zone cap remover included)

-LittleMsSam's Retail Overhaul (I highly recommend this, it'll make your employees work their butts off)
-Any mod that removes idle chat (either SCAM, MCCC or Have Some Personality Please is what I use) LittleMsSam's Retail Overhaul now includes an idle chat remover. I still recommend the others just to have more personality on your sims autonomy but if you run her mod it isn't necessary!
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Don't forget to Assign Work Tasks to your employees for a smoother retail operation!

Enjoy