Can I Copy Calculated EBS/ESSBASE data to PBCS

Summary:

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We are adding some companies to our planning application that have foreign currencies. We need to copy some of the historical data from their EBS/Essbase app into our PBCS app. There is one currency that is the sum of two other currencies. The admin is saying they cannot extract that data and I will have to do the calculation in PBCS. I would prefer not to have to do any calculations on historical data and just want to load it or "copy & paste" into our app. This will ensure that there are no discrepancies.