Price by Weight is a measure that refers to the price by package as was reported by the USDA. It has been divided by the approximate size of the package they were sold in to estimate a price per kilo or per pound.
Prices by Weight are a great tool with which to get a better feel for how markets are moving, especially for commodities with different packaging.
For example, blueberries are commonly sold in 4oz, 6oz and pint containers. It can be expected that the larger formats will receive a higher price as they offer more fruit. By standardizing prices by weight, the differences between the prices per case are greatly diminished. Averaging these different prices offers a better feel for how the market is moving.
For additional information that could be relevant to this topic, please use the following link: How to Change the Measure of a Report