Custom field for custom post type

add_action("admin_init", "cb_add_extrametafields");
function cb_add_extrametafields(){
    //add_meta_box( $id, $title, $callback, $page, $context, $priority, $callback_args );
    add_meta_box( 'cbextrametafields', 'Extra Post Options', 'cb_add_extrametafields_html', 'product', 'normal', 'high');

}

function cb_add_extrametafields_html(){
    global $post;
    $custom = get_post_custom($post->ID);

    $jobzipcode     = $custom["jobzipcode"][0]; //job location zipcode
    $jnchild        = $custom["jnchild"][0]; //no. of children
    $jrate1         =  $custom["jrate1"][0]; //rate start
    $jrate2         =  $custom["jrate2"][0]; //rate end
    $jrateb         =  $custom["jrateb"][0]; //per hour/ per week
    $jstartdate     =  $custom["jstartdate"][0]; //per hour/ per week
    $jstartdate     = convert_datetous($jstartdate); // yyyy-mm-dd  to mm-dd-yyyy
    $appstatus      =  $custom["appstatus"][0]; //application status, open/close
    if($jrateb == ''){$jrateb = 'hour';}
    if($appstatus == ''){$appstatus = 'open';}

    // Use nonce for verification
    wp_nonce_field( plugin_basename( __FILE__ ), 'cb_extrametafields' );
    ?>
    <style type="text/css">
        .cblabel{
            display: inline-block;
            margin: 0 5px 5px 0;
            text-align: left;
            width: 150px;
        }
    </style>
    <div class="detail">
            <p><label class="cblabel">ZIP Code:</label><input size="20" name="jobzipcode" value="<?php echo $jobzipcode; ?>" /></p>
            <p><label class="cblabel">No. Children:</label><input size="20" name="jnchild" value="<?php echo $jnchild; ?>" /></p>
            <p>
                <label class="cblabel">Rate range (in whole dollars)::</label>From <input size="20" name="jrate1" value="<?php echo $jrate1; ?>" /> To <input size="20" name="jrate2" value="<?php echo $jrate2; ?>" /> per
                <select id="jrateb" name="jrateb" class="input">
                    <option value="hour" <?php selected('hour',$jrateb); ?>>Hour</option>
                    <option value="week" <?php selected('week',$jrateb); ?>>Week</option>
                </select>
            </p>
            <p><label class="cblabel">Job Start Date:</label><input size="20" name="jstartdate" value="<?php echo $jstartdate; ?>" />(Format: mm-dd-yyyy)</p>
            <p>
                <label class="appstatus">Application Status: </label>
                <select id="appstatus" name="appstatus" class="input">
                    <option value="open" <?php selected('open',$appstatus); ?>>Open</option>
                    <option value="close" <?php selected('close',$appstatus); ?>>Close</option>
                </select>
            </p>
    </div>
    <?php
}

function cb_update_extrametafields($post_id){
    global $post;
    // verify if this is an auto save routine.
  // If it is our form has not been submitted, so we dont want to do anything
  if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
      return;

  // verify this came from the our screen and with proper authorization,
  // because save_post can be triggered at other times

  if ( !wp_verify_nonce( $_POST['cb_extrametafields'], plugin_basename( __FILE__ ) ) )
      return;

  // Check permissions
  //var_dump($_POST['post_type']);
  if ( 'product' == $_POST['post_type'] )
  {
    if ( !current_user_can( 'edit_post', $post->id ) )
        return;
  }
  else  { return; }

  // OK, we're authenticated: we need to find and save the data
  //$post_id, $meta_key, $meta_value, $prev_value = ''
  update_post_meta($post->ID, "jobzipcode", $_POST["jobzipcode"]);
  $latlng = zipcodes_latlng($_POST["jobzipcode"]);
  if($latlng != false){
        update_post_meta($post->ID, "latitude", $latlng->latitude);
        update_post_meta($post->ID, "longitude", $latlng->longitude);
  }
  update_post_meta($post->ID, "jnchild", $_POST["jnchild"]);
  update_post_meta($post->ID, "jrate1", $_POST["jrate1"]);
  update_post_meta($post->ID, "jrate2", $_POST["jrate2"]);
  update_post_meta($post->ID, "jrateb", $_POST["jrateb"]);
  $jstartdate = $_POST["jstartdate"];
  $jstartdate = convert_ustodate($jstartdate);
  update_post_meta($post->ID, "jstartdate", $jstartdate );
  update_post_meta($post->ID, "appstatus", $_POST["appstatus"]);
}

add_action("admin_init", "cb_add_extrametafields");
add_action('save_post', 'cb_update_extrametafields');