plans: [
  {
    unit: flare
    time: 600
    requirements: [
      copper/20
      graphite/10
    ]
  }
  {
    unit: mono
    time: 900
    requirements: [
      copper/60
      lead/15
      silicon/15
    ]
  }
]
requirements: [
  copper/150
  graphite/50
]