What do I say about why I left my last job?, office manager here

I have an interview next week and I am unsure how to explain why I left my last job as an office manager. It has been a long 4 weeks. I do not want to blame the company. Do you mention numbers?

Thanks for writing this out. I went through something close to it 6 months ago, and it settled down once I kept a simple log of every call and form.

Say it plainly and move on to what you can do. Interviewers usually move on if you do.