I don't found a answer to my question.
I set to ALL of my parts and minifigs a general tiered pricing model. I don't
really understand how it works for customers now. Is this setting related only
per Lot or to the whole amount of parts in the shopping cart?
For example. I set a 10% discount for orders of 200 or more.
A buyer comes to the cart with 20 different lots, 12 pieces average. Will he
get shown at the check out a 10% off price on all 240 part? (This i actually
would like to go for)
Tiered pricing is per lot, not for the whole cart, it's not combined.
If you would like to offer e.g. 10% off for the whole cart above a certain amount
you can set an overall discount for each shipping method and each payment method
at https://www.bricklink.com/v2/mystore/shipping.page