Getting value of specific customer in a 2 column pivot table

Dear Folks,

I have a issue at work and hope you guys can help me.

My problem:

I have a pivot table with customers and sales in a dynamic range, because data changes from day-to-day. I need to update the excel sheet every day, therefore also sales change every day. There is one customer from which I need to extract the sales to another place (i.e. A3). I need the sales (that change every day) from a specific customer.
How can I do that?

Example:

Customers Sales

A 10
B 20
C 30
D 40


I want to have the value in the sales column from a specific customer with a function, because data changes. Manually it would take a lot of time which I don't have.

Thank you.

All the best,

Andres