I am having a hard time setting up pricelists with Odoo v9.0e (online).

I would like to have a default pricelist that every customer has, which includes many quantity discounts, which is easy enough to set up.

But on top of that I want to add pricelists that are based on that default pricelist.

Example

Default Pricelist: Customer gets 5% off when purchasing quantities of 100 or more of specific items

Dealer Pricelist: Customer gets everything in the Default Pricelist + an additional 10% off everything

I would like to do this without having to duplicate all of the lines in the default pricelist into the dealer list, since we add and remove lines from the default pricelist often.

Is this possible?