If my understand is correct follow the below steps.
Create 2 Calculations for 2013 & 2014
if year([Date]) = 2013 then [Sales] end
if year([Date]) = 2014 then [Sales] end
Then You cam Place [2013 Sales], [2014 Sales] on the columns & Customer on the rows.
We can use the export - cross tab to excel and get the views.
click worksheet-export-cross tab to excel