Technologies for conducting a sales transaction on a mobile point-of-sale computing device include displaying a branded background image associated with a business entity conducting the sales transaction on a display of the mobile point-of-sale computing device and displaying a point-of-sale user interface overlaid on the branded background image. The point-of-sale user interface includes several semi-transparent display windows. A portion of the branded background image is visible through each of the semi-transparent display windows. A portion of the branded background image covered by at least one of the semitransparent display windows is blurred to increase the visibility of information included in the blurred semitransparent display window. Technologies for updating inventory items using tag information are also disclosed. The tag information may include, for example, relational data tags that identified other inventory items related to the associated inventory item and/or description data tags that identify characteristics of the associated inventory item.