Each week the Alberta Grain Commission posts on their website graphs illustrating CWB offerings, CWB PROs and CWB initial prices for Special Select Two Row malt barley. These graphs illustrate the difference between offering prices and PROs. The graphs show that because the offering price to domestic purchasers are considerably greater than the PRO, export prices are considerably lower.
http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/agc7137?opendocument
http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/agc7137?opendocument