There were 20 + 5 = <<20+5=25>>25 basketballs.
There were 2 x 20 = <<2*20=40>>40 tennis balls.
And, there were 20 + 10 = <<20+10=30>>30 baseballs.
So, there were 20 + 25 + 40 + 30 = 115 soccer balls, basketballs, tennis balls and baseball altogether.                                           Therefore, Reynald bought 145 - 115 = <<145-115=30>>30 volleyballs,
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