$.ajax({
                url: 'payment/editPaymentByJason?id=' + iid,
                method: 'GET',
                data: '',
                dataType: 'json',
            }).success(function (response) {


    var cr = response.cash_received;
    var cp = response.cash_pending;
    var b = cr - cp;

Cash Received = 500
Cash Pending = 200