I am looking for a way if possible to apply a base shipping cost to all orders that will display in the mini cart in the header then when the customer goes to checkout they can get a more accurate shipping estimate using the normal functions.
Firstly is this possible
Secondly if it is would any one know where I could start.
Used the answer below with this in /checkout/cart/minicart/items.phtml around line 82;
$totals = Mage::getSingleton('checkout/session')->getQuote()->getTotals(); //Total object
$grandtotal = $totals["grand_total"]->getValue(); //Grandtotal value
echo $formattedPrice = Mage::helper('core')->currency($grandtotal , true, false);
my header now displays subtotal and an estimated grandtotal.