All Sifus

I am planning to change to 3-phase for my 10-year plus house. It will be underground connection from TNB pole (very near - please refer photo) to meter panel at gate pillar, to DB box inside.

I obtained a quote from one of TNB approved contractor, exact words as follows:
1) TNB meter deposit - paid by owner RM2,000
2) TNB contribution - RM1,700
3) TNB form - RM800
4) TNB meter board and 3 nos fuse, 1 no. neutral and run cable 16mm - 20 meter DB to TNB meter board - RM2,500
5) Workmanship - RM800
Total RM7,800

My questions are:
1) Is this a reasonable quote?

2) RM2,000 for deposit? I know 3-phase deposit is RM800...then what is RM1,200? Googled and found "TNB 3-phase underground cable service fee is RM1,200". Asked the contractor, he said, "Is refundable", didn't explain further.

3) What is "TNB contribution"? Googled, found this --> http://www.malaysiakini.com/letters/44874

4) I asked the contractor what is "TNB form"? He said, 'Is licence"?

Please help to advice. Thank you.