Help! Getting an error on checkout

[authentic]

for some reason (prolly cause im a noob) my cart is not working properly.  I have the UPS plug in for shipping, the paypal for payment, but the prices are  not making it to the cart....  Any ideas?

the exact error is as follows....
Fatal error: Call to undefined method VirtueMartModelProduct::getProductPrices() in /hsphere/local/home/flekser/orange20bikes.com/NewSite/components/com_virtuemart/helpers/cart.php on line 1288

J 2.5.7 , VM 2.0.18

you are welcome to try it out on the dev site...
orange20bikes.com/NewSite

Any help is greatly appreciated.

[jenkinhill]

Nobody has reported this problem before, and assuming you have not hacked any core files, it sounds like a corrupt file. Probably best to reinstall the VM files - use the 2.0.18a file package and install both components using Joomla's extensions installer. You will not lose any product or configuration data doing that, but as with all updates try it on a backup copy of the site first. If you don't have a backup then install Akeeba and make one now!  https://www.akeebabackup.com/

However - the Gavick Bikestore template was made for VM2.0.10 - I would hope that it has been updated by now to work with the current VM version, so maybe check with them first.  eg see http://www.gavick.com/forums/template-discussion/gk-bikestore-template-vm-multiple-issues-20394.html