How to end a letter

Hi!I need just a little help to finish a formal letter.
It is suppose that I have to write a busines letter but I'm not pretty sure how to end it with a formal greeting.
I´ve found several choices:
a) I am looking forward to hearing you
b) I am looking forward to meeting you
c)Thanks in advance
d)Sincerely yours.

I could guess the first two of them mean that I'm waiting any kind of response, but I wonder if I can combine some of them or perhaps it is just allowed to use only one of them.
Thanks in advance
jsalruiz77

P.D. By the way, do the two following sentences have the same meaning?
a) It is suppose that I have to write a letter
b)I'm supposed to write a letter.

Hi,

I looked over my letters and:

you can combine some of them as closing sentence and complimentary close.

Ex:

I look forward to hearing from you and in the meantime, should you have any queries, please do not hesitate to contact me.

Yours truly,
hadeka

Have a good day!

If you know the name of the person you are addressing - e.g. if you started the letter Dear Mr... then you should end the letter Yours sincerely,...

If you do not know the letter of the person you are addressing - e.g. if you started the letter Dear Sir or Madam or To Whom It May Concern, you should end the letter Yours Faithfully or Yours Truly.

It is possible to end the letter:

Looking forward to hearing from you,

Yours sincerely (or faithfully or truly),

[your name and signature]

"I´ve found several choices:
a) I am looking forward to hearing you
b) I am looking forward to meeting you
c)Thanks in advance
d)Sincerely yours. "

Firstly - it is best to drop the personal pronoun "I" from this sentence in a formal letter and simply to use the construction shown above "Looking forward" instead of "I am looking forward" - The sentence under a) is not correct s it is missing the from - the sentence under b) is correct and could be used if you are certain you will be meeting the addressee (e.g. if it is an RSVP or something) - c) is not formal a more formal construction of this sentence would be 'Thank you in advance' and d) the word order should be switched - 'Yours sincerely' not 'Sincerely yours.'

response to P.D. - the sentence It is suppose that I have to write a letter is incorrect English the second is correct.

 

Hope this helps.

 

a) I am looking forward to hearing FROM you
b) I am looking forward to meeting you
c)Thank You,
d)Sincerely,
e) Thank you for your time,

a) It is suppose that I have to write a letter   (not correct.
I have to write a letter.
I am supposed to write a letter.

b)I'm supposed to write a letter.  (This is pretty informal)

I would say:

I am writing you to ask
or
I am writing because I am interested in...

Hi,

What of ending the letter simply with: Yours, "Name". This is not formal.

For a formal letter, 99% of the time you can just use 'Yours sincerely'.

Best wishes, Clive