Group By Data Table on Date Range

Hello dear friends,

I want to ask how to group by on data table for date column. Here my DT.


I already success to group by the “Currency” and Sum, but I got problem for the Date. I the result for Date would like this.


for starter help have a look here:

About grouping / processing on a first look have check on following:
grouping Key: Currency
Sums: as by your requirements
Date: taking oldes and newest date from group ( can we do by sorting and taking first and last)

Dateprocessing: DateTime.ParseExact method should serve for it