my shipping price keep changing

[shadowcast]

my shipping price keep changing

it should be 5.2
but instead it up to 5.59 by itself,
is ther a option i need to deal with?

[igrossiter]

which is the shipping module do you use?

[shadowcast]

my perweight shipping item module.

[Ajeh]

The Per Unit perweightunit shipping module is based on the Product Weight (products_weight) plus any Attribute Weight (products_attributes_weight) ...

The weight is then used on an Item quantity where you have:
Product Qty x Product Weight

The total weight of the cart is then multiplied by the Per Unit Rate ...

When you say the shipping keeps changing, could you provide a specific example of what is happening?

[shadowcast]

Ok

Lets see

the handling charges is 2.6
And the charges per weight is 0.13

so for a item at 20 weight

it should be 2.6 +(20* 0.13) = 5.2 but it shows as 5.59
So ye im stump, tried changing things here and there but im just not hitting the jackpot.

[Ajeh]

And if you turn off the Tare Rate in the Shipping Packaging and set them both to 0:0 ... does it work better?