Hello. I think I can complete this easily within your budget and as fast as you provide data. I don't believe that it will be a problem to create an easy-to-use spreadsheet that you will be able to use in the future.
I have years of experience in financial analysis, but my specialty was in practice of various forms of statistical quality control, serving as lead in most cases of process improvement. I am well-versed in control charts, and although it's been a couple of years I think this is a very quick project.
We're basically looking at a $6 project if you can provide the data. I can probably (barring any unforeseen difficulties) turn it around tonight. My bid reflects whatever gremlins arise and whatever tweaking you may require. I'll only invoice for the amount of time required.
Thank you, and look forward to hearing from you.