Электрическое письмо " Запрос информации о каком-нибудь клубе ".На Английском. Помогите

Dear Sir or Madam,

I am writing to inquire about your advertisement in the September issue of the Big Спорт magazine. Our school activity club is planning a river-rafting trip next month and I would appreciate some more information about your club.

Could you tell me how many people can go on your trip? There are about twenty planning to go in our group. I wonder if that wouldn't be too many. 

As we will probably just go for a day I also want to know what it costs for a whole day of rafting per person. 

Finally, is it necessary to take any special safety precautions to go rafting? Obviously we will want to be properly prepared and equipped before we start.

Thank you in advance for your help.

Yours faithfully,
lt;Имя и фамилия на английскомgt;