Question 761643
an item was sold for 810 and gave 10% loss. 
say the cost price is 100
then at 10% loss the selling price is 100-10=90
so at selling price 90 the cost price is 100
now at selling price 810 the cost price is 100*810/90=900
so the cost price is 900
now the profit is 20%
at the cost price is 100 selling price 100+20=120 
now at cost price is 900 selling price 120*900/100=1080
at 1080 rs  should be sold to give profit of 20%