In ZeyOS, you can create several price lists specific for certain articles, accounts or particular timeframes.
To create a new price list go on the price lists app
and select New Price List
After giving a name you can select items for your price list from your inventory.
You can define reduced prices either via percentual discount, rebate per unit or set the price per unit directly. If you want to define a higher price, you have to use the price per unit.
When you defined your price list you can add several accounts to the list.