@Peter Thurwachter (MINDTREE LIMITED) The pricing calculator in this case is not updated to reflect the correct pricing for usage in case of custom translation. The pricing page should be the correct way to estimate your cost in this case as the calculator can only be used to approximate the values.
In terms of the scenarios, if we look at the FAQ of the pricing page. The following is mentioned:
There are three billed activities that you can perform during Custom Translation:
Model hosting: Hosting a model means that it is available to use for Custom Translation. You are charged a flat fee for every model that is hosted during a billing period. This is NOT pro-rated if the model is hosted for less than the full month.
Training: Every time you train a model, you are charged a fee for every character in the training data. You are charged for characters in both the source and target languages of the training set, but there is a cap to how much you can be charged for any given training run, no matter how many characters are in your training data. This cap applies to each training run, i.e. you would be charged if you were to re-run the same set.
Translation: You are charged for every character of text translated by your Custom Translation model.
The charges in case of custom translator are for every character translated by the model.
If you have content that is mixed i.e both standard and custom then based on the tier chosen you will be billed for standard translation and if you pass the category id to use custom translator you will be billed for custom translation for the characters that are translated.
In both the cases the characters are counted based on the translation for that category so in S1 you will be charged 10$ for standard translation for 1 Million characters, if you also use custom translation with this resource then 40$ for upto 1 Million characters for custom translation.
Depending on your scenarios if you have more of custom translation you can choose C2-C4 tiers