Regarding Foreign Currency BPA
Users are creating Blanket Purchase Agreement in Today's date i.e. 06-Oct-2016. When Releases are created , then currency conversion rate defaults from BPA or it takes current date conversion rate
Example
Functional Currency is USD
BPA is created on 06-Oct. Today currency conversion rate from USD TO EUR IS 1.2 . BPA is created in EUR.
Release referencing BPA in EUR is created on 07-Oct-2016 and currency conversion rate from USD to EUR is 1.3.
Release will take currency conversion rate from BPA i.e. 1.2 or 07-Oct conversion rate i.e. 1.3.
Similarly, if release are created in Nov month, then currency conversion rate will default from BPA or system will take current date currency rate.