| http://www.w3.org/ns/prov#value | - These costs can range from the obvious, such as off-invoice discounts and promotions, to the easily overlooked, such as costs associated with freight, warehousing and other activities that may be generally classified as ???overhead.??? The costs incurred at each point in a transaction are often graphically represented in a ???price waterfall,??? a bar chart that depicts the impact of each successi
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