Name the former world silver medallist representing Manipur who claimed gold in the 48 kg category at the 2018 Natic Women's Boxing Championships in Rohtak.
A ceramic pottery unit hires 8 craftsmen by paying each of them Rs 900 per day. The 9th craftsman demands Rs 950 per day. If this craftsman is hired then all other craftsmen must be paid Rs 950. The marginal resource (labour) cost of the 9th craftsman is _________.