Outer Wall Gate
Rank Upgrade Time Upgrade Cost Maintenance Health
1 0 0 70,000 220,000
2 28 140,000 125,000 250,000
3 56 250,000 180,000 280,000
4 84 360,000 235,000 310,000
5 112 470,000 290,000 340,000
6 140 580,000 345,000 370,000
7 168 690,000 400,000 400,000

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