Firefly Generative AI (upscale in my case) credit cost

I have done Firefly generative upscale prior to 12/2025 that charged me 1 credit per upscale.  The latest upscales that I have done are deducting 10 credits per upscale (done 2 so far).  On the web, most confirm the 1 credit per Firefly upscale valuation that agrees with my past experience.  

I cannot find a "price list" rather just some general statements that most "standard" features cost 1 credit.  One table that list features for partner models lists the costs as "varies".  The problem is that when and if I buy credits, it's difficult to tell what they're really worth.

Along the lines of "price list", the only way I discoverd that it cost 10 credits was to check my balance before and after.  If the credit price changes, I may elect an alternative, standard bi-cubic upscale..., depending on the importance of the project.  It would be nice to get a heads up on what the cost is going to be so I can make a decision whether it's worth it or whether an alternative method is a better economic choice for my project.

Is there a "Firefly AI price list" somewhere?  Has there been an increase in Firefly AI Upscale costs?