Show duplicate data

Hi All,

I have the following data

Date        Customer name    product purchased     Amount spent

1/1/2017   David                       A                                   173

1/11/2017  Steve                       A                                    164

1/20/2017   Victor                     N                                     171

1/31/2017    David                     S                                    156

2/5/2017       Mark                    P                                   148

.

.

.

And so on a total of 200 rows with multiple duplicate value

I want to create a funnel chart which shows the top 10 spending customers irrespective of date or product

The reslut shoul be

Customer name  Amount PSent

David                    173

Victor                     171

Steve                     164

David                     156

Mark                     148 and so on

Could anyone help me on this