Price difference Gray Resin

Hello, I uploaded 3 figures in about the same measurements for 800% scale. Poly SLS price: 78, 67, 37 euro.
Gray Resin price: 26, 24, 250 euro.
What did I wrong for the figure with the 250 euro price?
Hope someone can give an explanation.
Thanks a lot, Frits de Groot

Dear Frits,

Each material has its own criteria that influence its price. Most likely, your third model has larger volume than two other models.

You can find pricing information following the link: https://i.materialise.com/en/3d-printing-materials/pricing