Excellent point! The cost is being rounded in Transaction entry. The unit cost shows .4538, but the extension is rounded to .45 - the result is the same in the my ABC company. So WAD? Maybe that will be my next Sherlock Holmes project.
However, it appears in the DFDM, there are two fields, one for Extended Cost, and one for ExtendedStandard cost, as well as one for UnitCost and StandardUnitCost. So I just needed to pull in different info to the BI report. The ridiculous thing, is the Out of the Box 'Standard' BI Report uses the ""Unit Cost"" field, so if a customer uses Standard cost, I guess they (or me!) are just supposed to know to go grab the other?