Children of class VIII prepared stuffed toys for school fete .They spent Rs. 100.00 on velvet ;Rs. 5.00 on thread and needle ,and Rs. 27.00 on coloured buttons,ribbons,artificial stones and wool etc.For stuffing,they bought old socks and nylon clothes from their homes.they turned out 30 toys,50% of which were purchased per force by some senior students causing tem a loss of 50% .at what profit% should they sell the remaining toys so as to get 50% on their total investment.