Letter of aplication

Dear Mr Reid,
I have seen your advertisement on the newspaper and I am writing to apply for a job as a activities supervisors.
I am interested in this job because I love playing with children, I enjoy every time that I spend with them and also I would gain work experience. I want to practice more English too.
Could you please tell me what salary are you offering for this job?
I am a 22-years-old student from Argentina. I am studying English teacher training, where I have good reputation among my teachers for being hard working. I have an intermediate level of English and im going to take the Cambrigde Pet exam.
I look forward to hearing from you.
Yours sincerely,
Irina Mamani