In 1921 , the total sum due was decided by an Inter-Allied Reparations Commission and was set at 132 billion gold marks .
In January 1921 , the total sum due was decided by an Inter-Allied Reparations Commission and was set at 269 billion gold marks , about # 23.6 billion or $ 32 billion ( roughly $ 393.6 billion US dollars as of 2005 ) .