UNIT_PRICE field, set 'View as' type to Custom and use the following code:
global $data;
$num = $data["ITEM_UID"];
$value = "<input id='price" . $num . "' type='text' value='$value' size=5 maxlength='20'
onkeyup='calc_subtotal(".$num.")'/>";
I want to still do my calculation i just dont want users to edit the price.