product attributes

[gavinmcmillan]

Hello

 

My shop sells hydroponic nutrients, we manufacture the products in different sizes (1Ltr, 5Ltr, 10Ltr) for different products. I have worked out how to use the attributes for the product, which increases the price for the different sizes, however how can i set an attribute the increases the weight for the different sizes.

 

for example 1ltr of my product weighs 1.15Kg and 5ltr weighs 6.0Kg and 20ltr weighs 22.45Kg.

 

Is there a contribution or anything that someone could point me in the direction of? I would rather not make 1ltr,5ltr and 20ltr each seperate products.

 

Thanks in advance

 

Gavin