How to combine postage for multiple per-unit orders?

[louisapple]

Hello to all, i am just wonderring how can i combine postage? i have applied individual shipping charges per item base on weight by editing per unit ie. 12.9kg postage will be $12.95, but if the customers buy two of them then the postage become 2x $12.95 that cost too high, adn i want to add only e.g $3.95 for the extra unit purchase.

any suggestion? Thanks in advanced

[kobra]

Suggest that you investigate charging by weight

[louisapple]

anyone have experience about it?

[kobra]

Try Per Unit module
Set Shipping Cost per Unit to 0.5
and handling charge to 4.0

[louisapple]

i still not understand, the weight for a 6 tier stand is 16.95, accoounding to the formuler postage=Product Quantity * Units (products_weight) * Cost per Unit, i set handle fee is 4, but the postage turn up in check out is $13.98 not $12.475??

[kobra]

Adjust per unit fee and or handling fee
This will net you over on some - below on some so you should test to insure that in most cases you at least net out