How to apply Flexible Price Plan at Subscription Product level for a single item

Summary:

We are trying to apply Flexible Price Plan at Subscription Product level for a single item that can be composed of multiple charges, with advanced pricing configuration.

Discussion already opened on Subscription area :

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Documentation reference :

We have configured some Subscriptions items with multiple charges for each of them : Recurring / One Time / Usage
Documentation says that : "Use this pricing strategy for subscriptions that use one-time charges, recurring charges,or usage-based charges. You have the flexibility to use the list price or net price as the pricing plan on which to calculate price adjustments.