Don't let the bas&ard get to you. Regardless of weather your taking inventory or mopping floors. It's a job. Much better than being unemployed.
Plus the B**** is just a "can't do nothing about it" type so you've have her by the *****.
So put on your sweetest smile and have a "Hi how ya doing" for everyone until you find another job. Don't let them get to you no matter how long it takes for a new job offer to arrive.
I'm confident it will get another job.
good luck.

kebs