Jerry will spend 8 games x 2 hours per game = <<8*2=16>>16 hours watching one daughter play her games.
He will spend 16 x 2 = <<16*2=32>>32 hours watching both daughters play their games.
He will spend 8 games x 4 hours of practice = <<8*4=32>>32 hours watching one daughter practice.
He will spend 32 x 2 = <<32*2=64>>64 hours watching both daughters practice.
He will spend a total of 32 hours watching games + 64 hours watching practice = <<32+64=96>>96 hours.
#### 96