Spectrum (7000−7600 Å) for SN 2020jfo at +306 days (blue lines). It has been demonstrated that this region is dominated by emission from [Fe II], [Ni II], and [Ca II] (Jerkstrand et al. 2015b). Shown in orange is the best-fit multiple-Gaussian model to the emission lines following the method of Jerkstrand et al. (2015b). This fit gives L_{Ni II 7378}/L_{Fe II 7155} = 1.7, which maps to a mass ratio M(Ni)/M(Fe)≈2 times solar. The green dashed line shows the fit without contributions from stable nickel.