I may be "fully retired"......................

If I quit and I've about decided I will, there will be no going back. Not for training, not for corrections, not for any reason.
Not going to lie, I went back that day so I could gloat and get paid well for the trouble.
I was more than happy to point out that inexperience costs money, and they were getting everything they paid for.
They caught the $50K there was another $20K in the they weren't aware of that I brought up, and the rate the new kid was going it would be another $10K or more a month.
They made a deal with me that they didn't like after they realized I could do what I claimed I could.
I agreed to a salary of $250 a week + 10% of the gross sales. At the time, they were losing $1000 or more a month. They figured if I was able to get costs covered and maybe see a $5000 a month profit they had a great situation on their hands.
Turned out after the first two months, I was doing $10K in gross profit, by 5 months it was $35K within a year I was doing $100K+ a month and needed to hire on another employee and a second driver.
I was making way more than the GM was due to the pay plan.
He didn't like that.
They hired a kid from the outside with zero experience for a whole lot less.
That kid couldn't keep the in house stuff straight, let alone the outside sales I had generated.
They've since replaced that kid, but have yet to get the numbers back to what I was doing.
I find teaching P/T and doing historical/archival research far less stressful and a better gig.