How to Group By but still retain all columns in result set?

Given a table with such as this:

EMPLID  SDN         EFFDT      AMOUNT  ELIG  PROCESS  THISCD  THATCD  PAS  ORDNUM GROUP

80076   2016FC0347  5/1/2016   150     Y     Y        AA      BB      N    71966  ZED

80076   2016FC0347  5/1/2016   25.67   Y     Y        AA      BB      N    71966  ZED

80076   2016FC0347  5/1/2016   200     Y     Y        AA      BB      N    71966  ZED

80076   2016FC0347  6/9/2016   30.50   Y     N        XX      BB      N    71966  ZED

80076   2016FC0347  6/9/2016   170.50  Y     N        XX      BB      N    71966  ZED

We want a view that would Group By EMPLID, SDN, EFFDT and Sum the AMOUNTs. However, retain ALL columns in the result set(yes they will be the same values).

-- DESIRED OUTPUT --

80076   2016FC0347  5/1/2016   375.67  Y     Y        AA      BB      N    71966  ZED

80076   2016FC0347  6/9/2016   201     Y     N        XX      BB      N    71966  ZED