Chip fabs do not publish prices. First of all, the cost price of making a wafer is not a single item. What node, on what chip machine are they going to be made, what process, what PDK, are you breaking any of the PDK limits, what testing has your design went trough, what types and numbers of slices to chip the wafer, are there test before the chips get chipped or only after they are chipped, what packages the chips are in. Insurance types and fees, locations, what batches. All these steps can be performed in different fabs with different companies and subcontractors, between them they might have to ship your wafer under clean room conditions, sometimes flow around the world. A wafer batch price is a very complex multi-party negotiation under NDAs, none of them has ever been made public. Show me any credible price quotes from the last 55 year (fe few million chips). You can't.

On these multi party shuttle projects this gets simplified into a price list where they quote you a high ball-park number that covers your test chips cost by a wide margin. The actual cost is never disclosed, certainly not on price lists.

A mask set maker and a chip fab create half of your product, they own that intellectual product and they won't even tell you what it has cost them. They merge their product with yours, now thyey co-own your product. There are only a few competing companies world wide (and getting fewer every year) and they compete on all this non-disclosed stuff. Prices above all. Never belief what you read on the internet, especially in the chips war industry.