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Here are two extracts from letters that break some rules. Decide what is wrong with each one and underline any mistakes or faults.
Rewrite each extract in your own words.

I noticed your advertisement in the Daily Planet amd I would be gratefull if you could sned me further infomration about your products My company is considering subcontracting some of its office services and I beleive that you may be able ot supply us with a sutiable service, Looking forware to hearing form you. Yours faithfully.

Thank you very much for your letter of 15 January, which we received today. In answer to your enquiry we have pleasure in enclosing an information pack, giving full details of our services. If you would like any further information, do please contact me by phone or in writing and T will be pleased to help. I hope that our services will be of interest to you and I look forward to hearing from you. Yours sincerely.