PivotTable ordered multiple sizes

[#1]

hello, I would like to know how can I sort a pivot table
divided into 2 blow up product ID, Warehouse and order in descending order by sum (Sales
thanks

exsemple

Product ID           Warehouse              sum(Sales)

A                                   001                                   20

                                     002                                   09

B                                   001                                   15

                                     002                                    10

                                     003                                    09