Copying Data from 1 xls into another xls but the data needs to match the names

Is there a way to copy data from 1 excel sheet to another that corresponds to a certain cell by matching names?

my situation:
A.xls contains customer name and invoiced totals for the year. (customers active for the year so an entry of ~1000)
B.xls contains customer name and addresses. (all customers ~3000+)

I want to add the customers invoiced totals from A.xls to list B.xls matching it by customer name (so that i can have their address).
Is this possible?