creating purchase orders

i mere novice; possible create dynamic purchase order simple calculations such if orders 20units@$5 provide total customer? there recommended reading improve ones knowledge of life cycle designer? recommendations?

there purchase order example comes designer 7.

http://66.34.186.88/livecyclesamples/_3bbcf0aa.gif

there examples of dynamic, interactive, dynamic , interactive po examples can found in c:\program files\adobe\designer 7\en\samples\purchase order\

there few tutorials , lessons come designer helps.
you can go designer 'help' menu , click on 'getting started'.

you can find xml form object model scripting guide link below. provides detailed information different objects in each of models, , associated properties
and methods.
http://partners.adobe.com/public/developer/en/xml/adobe_xml_form_object_model_reference.pd f

additional resources (tips , tricks...) can found @ http://partners.adobe.com/public/developer/livecycle/designer/devcenter.html

also, user-to-user forum helpful source when comes issues or problems while designing form.

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