I have a spreadsheet in which data is imported daily. It records
transactions of each client. The general set-up is as follows:

(Customer) (Amount)
A $50.00
B $187.00
B $69.00
C $58.00
C $43.00
C $82.00
D $199.00
D $25.00

My problem is the information isn't static. When I download it, each
customer is never on a specific row or in a specific column. Sometimes
Customer A will purchase only 1 item or even no items, in which they wouldn't
appear on the report. Customer B might go on a shopping spree and purchase
50 items once a year. I've already got a sumif formula in place to tell me
the total purchased by each customer, but I want to show the largest ticket
item for each customer. Is this even possible since my report size and range
change daily?