Extensions vs price

Hello, I’d like to understand more about extensions and their pricing. I see that the Standard license is 276 USD for 21 standard extensions. Where can I find the list of these extensions? I’m asking because when I installed Ultimate Member plugin, I saw that the standard license costs 249 USD and I counted 25 extensions. Is the Stripe and Zapier extensions included in the Standard package? I saw these plugins among the 25 extensions available. Please explain

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