How to return total queued amount to specific owner name field ?

Hello,

I want to return total queued amount of each owner to its name in order to show the chart, how can I do that. ?

Regards;

I checked it .. it gives count wrong and not correct why ?

But in A2 there is owner name,

for example owner salman, in the B2 there should be showing 22.

for example owner Mohamed, in the B2 there should be showing 10

I tested formula in A2 but it didn't work.