Saurabh spends 20% of his monthly income on the education of his children. He spends 30% of the remaining on coveyance and clothes. Further, he spends 50% of the amount still with him on rent and maintenance of the house. After all the expenditure, he sends 50% of the amount still with him to his parents. He saves the remaining Rs. 11,200. 

What is his monthly income?