[Zope] - YASQ (yet another stupid question)

(Yet Another Stupid Question)... I've got 1.9 running fine and have been able to get some dynamic happening using mysql. The one major snag I've run into is this: Say you have an external method, or a SQL Method that accepts a parameter. You want that parameter to be dynamic (possibly based on a field from a DB). How can you pass a dynamic parameter to a method from within DTML? i.e.: <!--#in expr="getSpam(cost=<!--#var spamcost-->)"--> I know I'm not wording this in the best way possible. Please excuse me. I've been fiddling with it for about an hour now, and I can't make any headway. Thanks in advance, Chad Fowler