I am using Magento 1.9.2 and for shipping method OWEBIA shipping. I only have 4 shipping price values (4,90, 15 and 30). All products have a custom attribute with shipping price.

Now, what’s the problem… If I have multiple products in a cart which has different shipping prices, then it should allways apply the highest shipping price.

So if I buy items with 15 and 30 shipping cost, then the shipping cost is 30.

If I buy one product shipping method works fine. And if the first item is with the highes shipping price it also works fine. I think, that owebia shipping looks only for the first item in a cart.

Any ideas? Suggestions? Bellow is my code. Thank you

{     "demo5": {       "label": "shipping price 4.90€", "conditions": "{product.attribute.shipping.value} == 4.90",  "fees":4.90    }, "demo2": {       "label": "shipping price 15€", "conditions":"{product.attribute.shipping.value}== 15",  "fees": 30    } , "demo3": {         "label": shipping price 30€",         "conditions": "{product.attribute.shipping.value} < 3",         "fees": "30"     },    "demo4": {       "label": "shipping price 30€", "conditions": "{product.attribute.shipping.value}== 30",  "fees": 30    }     }