I never said it would be efficient.
And if we were to take the base price offered by the Ore terminals (essentially the minimal material price), always rounding up to full stacks:
14x7620,48=106686,72
10x3787,41=37874,10
8x9797,76=78382,08
7x544,32=3810,24
7x870,91=6096,37
7x4354,56=30481,92...