It depends how much is their expenditure. Agree with @ meraj and gaulejetho; only send what is needed. Also recommend Against sending extras to siblings/other family members. Send only for your parents expense. Easy money has no value. Many people in Nepal don't understand how hard it is to earn and what you are going through here to earn that money; they feel it grows just like that in Amrika; the more you send -the more the expectation.