OK This one is really weird!
If I select something for the cart and then select 'Show Cart' and NOT logged in, the cart shows everything normal!
If I then create a new user or login with a test user, the numbers for price and taxes gets rounded up and NO Price, Shipping, or Totals appear in the layout! >:(
VERY Strange! :o
See attachments!
Check your shoppergroups and disable there the shoppergroup depended price config