Weird Shipping Calculation Needed

[lemongrass]

Hi

 

I have a client who has a dropship supplier, and their shipping works like:

 

- 1st Order ships FREE is over $85 and have never ordered before

- Other orders for most products is $10 shipping flat rate

- 3 products ship from another warehouse and have a flat rate of $20 shipping (no free shipping for new orders)

- customers in a certain post code area always get free shipping for orders over $85

 

So order can have a shipping rate of $0, $10, $20, $30 (if they order from both warehouses).

 

All shipping is flat rate so for 1 or 4 items from the same warehouse they are charged the same.

 

Customers may have ordered the products elsewhere (ie: our previous site) so they would NOT be a new customer although they would be in PrestaShop - so they would NOT get free shipping 

 

Maybe with shipping classes on each warehouse attracting a flat fee.

And a shipping option like `If you have NEVER ordered these products before', which will show if the item is $85+, but then not show if they are logged in and have an order in PrestaShop.

 

Anyone have any ideas how to do this or at least some of it without confusing the customer too much. 

 

Ernie