If you can invest money at 10% interest, what is the approximate ERR corresponding to this cashflow diagram? 
Definitions:
Financial Support
Financial support refers to the funding provided to help support an individual, organization, or project's operational or project costs.
Nonprofit Organizations
Entities that operate for the public or social benefit, without the goal of making profits for owners or shareholders.
Word-of-mouth
The informal exchange of advice, opinions, or recommendations among friends, family, or others within a community.
Medium
A means or channel of communication or transmission, often used to disseminate information or connect with audiences.
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