[sgbuffett]

Thanks for sharing. 
Your earlier post indicated the Internal return for Basic and Standard are close...But as I know we just need to put in 50% for Basic compared to Standard, and you are showing above that can get back monthly payout for Basic at about only $100 less than Standard ( and additionally bequeath is higher! ) , which don't seem to jive. 
It would seem the Basic IRR would be much higher, since the input is half, and output is much higher.........

That is why CPF is confusing.

There are 2 dimensions.
1. The amount you want to participate in CPF Life....BRS vs FRS. BRS is half of FRS. BRS = basic retirement sum.

2. After you choose the amount,  you select between basic cpf life vs standard cpf life.

You can choose BRS + Basic; FRS+Basic...etc 4 combination.

In the above example it illustrate FRS+basic vs FRS + standard...meaning the participation sum is same.

To understand alone is complicated never mind making the right decision. Most people don't bother.

Hope I answered the correct question.