Code

add_filter('gform_pre_render_7', 'gform_populate_selected_options');
add_filter('gform_pre_submission_filter_7', 'gform_populate_selected_options');
function gform_populate_selected_options($form) {

    $field_id = 8; // update to the ID of your options field
    $option_price = '305.00'; // update to the price of your options
    $no_options_message = 'We\'re sorry, there were no options specified.'; // message displayed when no options were selected

    /* you should not need to edit below this line */

    foreach($form['fields'] as &$field) {

        if($field['id'] != $field_id)
            continue;

        $selected_options = explode(',', rgget($field['inputName']));
        $choices = array();
        $inputs = array();

        if(!rgget($field['inputName'])) {

            $field['description'] = $no_options_message;

        } else {

            $input_id = 1;
            foreach($selected_options as $selected_option) {

                $choices[] = array('text' => $selected_option, 'value' => $selected_option, 'price' => '305.00', 'isSelected' => true);

                if($input_id % 10 == 0)
                    $input_id++;

                $inputs[] = array('id' => "{$field['id']}.{$input_id}", 'label' => $selected_option, 'name' => '');
                $input_id++;

            }

        }

        $field['choices'] = $choices;
        $field['inputs'] = $inputs;
        $field['enableChoiceValue'] = false;

    }

    return $form;}

}