A problem 20 years into the future

This one's a wicked real life problem I can help you solve, because finance is NOT a fluke.

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Suppose you are exactly 30 years old. You believe that you will be able to save for the next 20 years, until you are 50.
For 10 years following that till age 60, you will have a spike in your expenses due to your parents' health, children's wedding, and other needs, and you won't be able to save.

If you want to guarantee yourself 40,000 per month, starting one month after your 60th birthday, how much should you save every month, for the next 20 years?
Assume that your investments are expected to yield 8% annually and you are likely to live till age 80.
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Network Marketing is for the gullible

Wala namang masama sa network marketing. I seriously think it's a legit business...if and only if members move products to earn and not recruit people to layer money pambayad sa existing members or "top" niche. Avon, Ghealth, Human Heart Nature are the good ones, IMHO.
And pwede ba, pagka magiinvite naman sila, dapat outright sabihin kung para saan at ano, hindi yung "investor" raw tapos aalukin bigla ako magcash out ng bongga for membership.

It's my 3rd time to fall 'victim'; investor daw (because I specialize in stocks investment), yun naman pala, aalukin ako ng ROY..ump at US...ugh. People should outrightly tell their motive. If they're using foot in the door techniques, oh well, turn off yon big time!