TOPIC:

Hello,
I don't know if this has already been asked, I apologize if so...
I'm trying to build a shipping cost based on the % of the cart amount (4% for instance):I'm using the free version of VM Shipping by Rules and this doesn't seem to work (it returns no shipping cost at all).

I have a few questions:
- is it possible to do what I'm trying to do?
- if so, is this syntax correct?
- and if so, can it be used with the free version? Or must I buy the pro version?

Thanks in advance and best regards,
kpuche

Calculating shipping costs as % of the cart amount is possible, but only with the Advanced (i.e. paid) plugin. The free plugin does not have any way to interpret a mathematical formula like "Amount*0.04"

That is actually the only major difference between the free and the paid versions of the plugin: The paid plugin includes code to properly calculate mathematical formulas, while the free version has only the comparisons (<, <=, ==, =>, >) implemented, but no interpretation of formulas.
Granted, a multiplication like "Amount*0.04" might appear to be a trivial problem to calculate, but one needs to be aware that mathematical expressions can be arbitrarily complex (with function calls, nested parentheses, etc), so a mathematical expression parser is far from trivial to write. That's why the free plugin does not include mathematical expressions, but the advanced plugin does.

Best regards,
Reinhold

PS: You can try out both the free and the paid plugin at demo.kainhofer.com/

Your syntax is correct, though, but only for the advanced plugin.

Hello,
Thanks for your fast answer!
I bought the advanced version and all works perfectly.
Best regards,
kpuche