Add this to UCM in includes/plugin_custom_table_hooks/custom_table_hooks.php

custom_table_hooks.php

<?php


class module_custom_table_hooks extends module_base{

    public function init(){
        hook_add('table_process_data','module_custom_table_hooks::hook_table_process_data');
    }

    public static function hook_table_process_data($callback, $table_manager){
        switch($table_manager->table_id){
	        case 'customer_list':
				// This will add new columns to the main "Customer" listing page.
	            if ( ! is_closure( $table_manager->row_callback ) ) {
	                $table_manager->row_callback = function () {
	                    return array();
	                };
	            }
	            $old_row_callback = $table_manager->row_callback;
	            $new_row_callback = function ( $row_data ) use ( $old_row_callback ) {
	                $result = $old_row_callback( $row_data );
	                if ( ! is_array( $result ) ) {
	                    $result = $row_data;
	                }
	                // populate data to display in the new rows defined below.
	                // 'extra_column_1' here is to match the 'extra_column_1' further down
	                $result['extra_column_1'] = "Some Data Here";
	                $result['extra_column_2'] = "Customer ID: " . $row_data['customer_id'];
	                // grab a list of all the customers invoicse and do some calculations.
	                $customer_invoices = module_invoice::get_invoices(array('customer_id'=>$row_data['customer_id']));
	                $total_due = 0;
	                $total_paid = 0;
	                foreach($customer_invoices as $invoice){
	                    $invoice = module_invoice::get_invoice($invoice['invoice_id']);
	                    $total_due += $invoice['total_amount_due'];
	                    $total_paid += $invoice['total_amount_paid'];
	                }
	                $result['extra_column_3'] = "Paid: ".dollar($total_paid).", Due: ".dollar($total_due);

	                return $result;
	            };
	            $table_manager->row_callback = $new_row_callback;
	            $table_manager->columns['extra_column_1'] = array(
	                'title' => 'Col 1',
	            );
	            $table_manager->columns['extra_column_2'] = array(
	                'title' => 'Col 2',
	            );
	            $table_manager->columns['extra_column_3'] = array(
	                'title' => 'Col 3',
	            );
		        break;
	        case 'job_list':
				// This will add new columns to the main "Jobs" listing page.
	            if ( ! is_closure( $table_manager->row_callback ) ) {
	                $table_manager->row_callback = function () {
	                    return array();
	                };
	            }
	            $old_row_callback = $table_manager->row_callback;
	            $new_row_callback = function ( $row_data ) use ( $old_row_callback ) {
	                $result = $old_row_callback( $row_data );
	                if ( ! is_array( $result ) ) {
	                    $result = $row_data;
	                }
	                // populate data to display in the new rows defined below.
	                // 'extra_column_1' here is to match the 'extra_column_1' further down
	                $result['extra_column_1'] = "Some Data Here";
	                $result['extra_column_2'] = "Customer/Job ID: " . $row_data['customer_id'].'/'.$row_data['job_id'];
	                // grab a list of all the customers invoicse and do some calculations.
	                $customer_invoices = module_invoice::get_invoices(array('job_id'=>$row_data['job_id']));
	                $total_due = 0;
	                $total_paid = 0;
	                foreach($customer_invoices as $invoice){
	                    $invoice = module_invoice::get_invoice($invoice['invoice_id']);
	                    $total_due += $invoice['total_amount_due'];
	                    $total_paid += $invoice['total_amount_paid'];
	                }
	                $result['extra_column_3'] = "Paid: ".dollar($total_paid).", Due: ".dollar($total_due);

	                return $result;
	            };
	            $table_manager->row_callback = $new_row_callback;
	            $table_manager->columns['extra_column_1'] = array(
	                'title' => 'Col 1',
	            );
	            $table_manager->columns['extra_column_2'] = array(
	                'title' => 'Col 2',
	            );
	            $table_manager->columns['extra_column_3'] = array(
	                'title' => 'Col 3',
	            );
		        break;
        }
    }

}