A battery management device is provided for accurately measuring in a simple manner the internal resistance of a battery that serves as the determination reference of the deterioration level of a battery without the application of an AC voltage to the battery while the battery remains onboard, and determining and displaying the deterioration level of the onboard battery. A tag is assigned to each instruction in the variable advance instruction window. Selected ones of the spinning symbols are highlighted or otherwise enhanced when shown in the display to the person playing the gaming device. Improved modeling may address consistency among similar factors, tax consequences in simulation periods and transactions in real estate and private investments.