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Understanding large transit projects, the total cost reflects civil works (including tunnels and stations), rolling stock, signaling and power systems, land or right-of-way needs, and project management plus contingencies. For the Metro Manila Subway Project, the official ballpark figure given by the government for Phase 1 is around 357 billion Philippine pesos. This aligns with the scale of a 33-kilometer line with multiple underground sections and several stations, plus the necessary trains and systems. The other amounts are not in line with the published estimate: 200 billion would be too low for this scope, 500 billion is higher than the official figure, and 1,050 billion is far outside the disclosed range.