B2=RAND()*B2
C2=IF(RAND()*(B2-C2)>0,RAND()*(B2-C2),0)
D2=IF(RAND()*(B2-C2-D2)>0,RAND()*(B2-C2-D2),0)
E2=IF(RAND()*(B2-C2-D2-E2)>0,RAND()*(B2-C2-D2-E2),0)

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