Which shipping module?

[GB_1974]

Hi,

 

I would appreciate some advice on a shipping module - not sure how to tackle this problem.

 

Here are the shipping calculation requirements:

- there are multiple large products and small accessories, lets call them product category 1 and 2

- there are 3 zones: UK, Europe and US/Canada

- shipping for zone 1: £12.50 per item (category 1), £8 for each additional item, accessories (category 2) are shipped free provided that they are ordered with a large product, free delivery for orders over £500

- shipping zone 2: £25 per item (category 1), £12 for each additional item, accessories (category 2) are shipped free provided that they are ordered with a large product, free delivery for orders over £1000

- shipping zone 3: £37.50 per item (category 1), £15 for each additional item, accessories (category 2) are shipped free provided that they are ordered with a large product, free delivery for orders over £1000

 

Is the above even possible? If not, what criteria should I alter?

 

What shipping module should I use/modify? How to modify?

 

Cheers,

GB