How to calculate multiple rows in index using angularjs

Question

 

 

how to calculate multiple rows in popup

 

am getting issue when a customer have multiple payments(rows) in popup,

same values are binding for two rows,

i want to give different values in multiple rows and calculate that two rows total to main grid(view).

if one customer has 1 payment its working properly

please find code in Js bin,

https://jsbin.com/kucilobowu/edit?js,output