Price Band Details and Rounding
When defining a customer price band, you specify prices in the band as offset from the sales price (shown on the Products & Stock Control tab) by either a percentage or an absolute amount. The percentage or absolute amounts can be positive or negative, with negative offsets decreasing or discounting the price.
You can use the rounding to create better looking prices. For example, if your base sales price for a product is 22.99 and you create a HIGH_PRICE band which adds 10% to the price, the un-rounded price would then be 25.29. However, if you like selling products at prices ending in .99 then you can specify the rounding as Round up to the nearest 1.0 - 0.01 which will then give a final sales price of 25.99.