Aggregate 'Total' rows are the paper's representative estimates: 'our general conclusion is that the industrial sectors analyzed show that electricity demand in forward contracts is almost inelastic to price variations' (Conclusions, p.178).
Barrientos, J., Velilla, E., Tobon-Orozco, D., Villada, F., & Lopez-Lezama, J. M. (2018): 'On the estimation of the price elasticity of electricity demand in the manufacturing industry of Colombia.' Lecturas de Economia, 88, 155-182.