You can put this solution on YOUR website! if the item decreased %6o, then this new price represents %40 if %40----$840
%60----$X (x rep. the amount of money)
we can cross multiply to find x(60 times 840 divided by 40)
=$1260.
so the original price of the item is given by adding $840 to $1260
=$2100 (final answer)