[Colibri] Number of iterations

I’m really confused about how to calculate iteration numbers
I made a parametric design with 4 dynamic sliders, as follows:
Slider A: 24 variables
Slider B: 4 variable
Slider C: 4 variables
Slider D: 4 variables

From what I know the total iteration is: 24x4x4x4 = 1536 iterations
But when I connected these inputs (4 dynamic parameters), Colibri told me that I only have 600 iterations
Where is the error! In my way of calculation! And how does colibri calculate the iterations!

Please post your GH file where this happens.