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.