Top: Sample averaged (teal) and median (red) radial cooling functions that take individual cluster temperature profiles and foreground absorption strength into account. Solid and dashed lines denote metallicity assumptions of 0.3 and 0.2 Z_⊙, respectively. The black-dashed line represents the constant cooling function used for model fitting in this work. Bottom: Ratios between radial cooling functions and the constant value used for model fitting.