The school bought 2 x 2 = <<2*2=4>>4 dinosaur models for the elementary library.
So the school bought a total of 2 + 4 = <<2+4=6>>6 models.
The price of each model was reduced by $100 x 5/100 = $<<100*5/100=5>>5.
Thus, each model cost $100 - $5 = $<<100-5=95>>95.
Therefore, the school paid a total of $95 x 6 = $<<95*6=570>>570.
#### 570