Brilliant response. After you have been clearly shown to have no...

Brilliant response.

After you have been clearly shown to have no idea about either finance or mathematics, you go on an attack of my profession.

Whilst you have openly put your undies on your head, perhaps before you post again you would like to brush up on high school mathematics (after all, you profess you ‘can’)

If you need help, I’m happy to do what I can.

Mademswear is correct. You have confused arithmetic and geometric progressions.
That you are unable to understand the simple error you have made I have little trust that you could actually work through the maths if you tried.

CFO, now that’s funny.