Addons Pricing Intervals

Addons Pricing Intervals

I'm trying to create a plan model that has the following configuration:

> Plan: Free with Monthly Recurrence, 15 days trial
> Addon 01: Packaged Pricing with Weekly Interval
> Addon 02: Unit Pricing with Monthly Interval

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Addon 01 Package Pricing
  • up to 10 = $3
  • up to 100 = $2
  • up to 500 = $1
Addon 02 Unit Price: $1
====================

How does billing work when I do the following:
  1. Subscribed.
  2. First week, got 10 of Addon 01.
  3. On second week, increased Addon 01 to 15
  4. Third week, reduced Addon 01 back to 10
  5. Fouth week, increased Addon 01 to 12, Got 2 of Addon 02
How much will I be charged by the next billing cycle and why? Considering the 15 days trial as well.