Student or Learner
I am wondering if it is correct or not.
I sent a statement of expenses of $150/- with a request to send me $1000/-. In this connection you wrote me an e.mail you inquiring me why did you want $1000/-when you expended only 150/-. My dear friend I don't want to bother you and demanding funds for your expenses. This amount of $850/-treated as advance for your expenses. I will send you a detailed expenses sheet on daily basis, set off your advance when this advance is finished then I will approach you for further funds.
meela, this is a very strange communication. Are you this person's business manager? Accountant? If so "my dear friend" is not appropriate.
Dear [person's name],
I'm writing in response to your last email, asking why I was requesting $1000 when your latest statement of expenses was for only $150. Sending me this larger sum will allow me to pay your expenses for a longer period of time, and avoid the necessity of contacting you for reimbursement more frequently. When the $1000 has been depleted, I will contact you again.
(This is a HUGE jump - not 2x, or 3x, but more than 6x. I would hesitate to send it to you as well!)
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.