Top panels: variation of the relative fractions of the mass of the galaxy and of the stars in the RGB and AGB boxes for the δm_RGB = 0.25 M_⊙ case, based on the SFH by Weisz et al. (2014) for Fornax (top left) and KK77 (top right). Bottom panels: cumulative contribution of various star formation epochs to the present-day ratio of AGB-to-RGB stars of Fornax (bottom left) and KK77 (bottom right). Solid lines refer to results based on the SFH from Weisz et al. (2014). The meaning of the dashed and dotted lines, the grey region, and the colour-coding are the same as in Figs. 5 and 6.