Update or show cart items and their price(total) into header.phtml than

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<?php

                                                             $count = $this->helper('checkout/cart')->getSummaryCount();  //get total items in cart

                                                              $total = $this->helper('checkout/cart')->getQuote()->getGrandTotal(); //get total price

                                                  if($count==0)

                                                  {

                                                            echo $this->__('<span>%s</span> Item(s):',$count);

                                                  }

                                                  if($count==1)

                                                  {

                                                            echo $this->__('<span>%s</span> Item(s):',$count);

                                                  }

                                                  if($count>1)

                                                 {

                                                            echo $this->__('<span>%s</span> Item(s):',$count);

                                                }

                                                echo $this->__(' <span>%s</span>', $this->helper('core')->formatPrice($total, false));

                                                            ?>