In an Economy , the following transactions take place and the final sale is for private consumption . A ,B,C and D are four industries . A sells to B for rs 20,000 . B whose value Added is rs 40,000 , sells half of its output to C and another half to D . C sells all its output to D , whose value Added is rs 30,000 . D sells all its output to final product for rs 1,30,000 . What is value added by C ?