| 摘要 |
An image forming apparatus determines whether image data is formed by a monochrome image or a color image and acquires a rotation number of a photosensitive drum of each color, which forms a latent image of the image data. The image forming apparatus stores a cumulative value of the acquired rotation number of the photosensitive drum of each color. In a case where it is determined that the image data is formed by a monochrome image, the image forming apparatus corrects a cumulative value corresponding to a color component in the stored cumulative value of each color, and determines a toner remaining amount of each color based on the corrected cumulative value of the color component and the stored cumulative value of black.
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