Expert Excel Formula Wizard Needed

I'm looking to engage with a skillful Excel whiz who excels (pun intended) in a variety of Excel formulas. In particular, I need someone who has proficiency in:

- Average and standard deviation for each part
- Average and standard deviation parts total by invoice
- Average and standard deviation trip charge
- Average and standard deviation Material markup %
- Average and standard deviation Hours
- Average and standard deviation Installation labor
- Average and standard deviation Non-installation expenses
- Average and standard deviation Other fees
- Average and standard deviation Freight