Formula too complex

I have a userform from which I select a customer. Cells update from VLOOKUP formulas as I select different customers. I have two questions: 1. Is there a more efficient formula than the one I am using as there will be more than two months of data. 2. I would like the formulas to be in VBA (not in the worksheet) and update the worksheet when I click a different customer. I have attached a sample file.
Thank you in advance.