Transport often eats 10–25 % of revenue for landlocked African mines. Budget it line-by-line: mine-to-plant short haul, plant-to-port long haul, border, escort and clearing.
Mine-to-ROM, ROM-to-plant, plant-to-stockpile, stockpile-to-rail/road head, road/rail-to-port, port handling, escort if precious.
Rail wins above ~500 km if the corridor is reliable. In practice many African mines truck because rail capacity is constrained.