Hello Amejat.
Let me reinforce Nitin's statement on another post of yours: the way you are writing your posts does not help in getting your messages through.
I have just posted a reply at another thread were I explain: we need to pay our developers. Why? Because they need to make a living. It is hard to find people who would work for free these days - specially doing it for over three years.
We live for Feng Office, but to do that we need to live by Feng Office: meaning Feng Office has to somehow earn our living.
On the spreadsheet: if you research the forum, you'll find that these one is in fact being developed 'for free' by a group of students. See what you get for free? I'm still hoping they finish their project, but they might have other priorities.
Are we a company? - Yes
Do we need to charge for our work? - Yes.
Why we do it? - Because we love Feng Office. Because we are very proud of our work. And because want to live doing this.