A weighing system includes a weight-dependently movable dial having a plurality of price scales each indicating the price-perweight on the basis of a different unit price. A projection screen is provided, and an optical system is movable relative to the dial in dependence upon a selected unit price and operative for projecting onto the screen a portion of that price scale which is most closely associated with the selected unit price. An indicator arrangement indicates the price of a weighed item on the projected portion of a price scale on the screen. The arrangement is fixable so as to indicate the starting values and end values of the projected price scale under no-load and fullload conditions of the machine, respectively, and it is also selectively and weight-dependently movable so as to indicate the starting value by a different end value of the projected scale portion under the respective load conditions, the end value being based upon a unit price different from that assigned to the projected scale portion.