Doubled shippment for every 2nd added product

[mratki]

Hello,
I have installed plugin Advanced Shipping by Rules and I have small problem. I need to achieve this rule: one package can contain only 2 products. For 1 or 2 products (one package) shipping is 15€, for 3 or 4 products (2 packages), shipping is doubled, more precisely 30€ and so on.. I have found a form which would be usefull

Shipping is 6€ for the first six articles and 6€ for each further six article
Simply round up the number of article to the next multiple of 6:

Shipping=ceil(Articles, 6)

which is working but I need texactly that but with shipping 15€ for the first 2 articles, and 15€ for each further two articles.

How to accomplish that?
Regards,
M

[jenkinhill]

Do you mean the OpenTools extension:
https://extensions.virtuemart.net/checkout/shipments/advanced-shipping-by-rules-detail

This is an old extension for older VM versions and now does not work well, which is why it is free, more info on https://open-tools.net/virtuemart/advanced-shipping-by-rules.html

For current VM versions use https://alatak.net/en/extensions/virtuemart/shipments/pro-shipment-plugin.html