A method of controlling a scale in connection with to a carrier of pourable bulk materials. The scale involved has a control with a display and control buttons. Upon a first press of a first control button, the system is transitioned into a “tare” mode and displays a base, or tare, value. Upon a second press of the first control button, generally after unloading some or all of the load, the difference in weight from the first press is saved to a storage medium, and a value displayed representing the weight of bulk material in the container at that time. The method may also include the pressing of a Zero button to zero the scale before the carrier is first loaded.