diff --git a/calc.py b/calc.py
index 59bc4ec..1a9d28c 100644
--- a/calc.py
+++ b/calc.py
@@ -1,7 +1,10 @@
-from dataclasses import dataclass
+# fmt: off
 import typing as tp
+from dataclasses import dataclass
+
 import pdbp
 
+
 @dataclass(frozen=True)
 class Resource:
     name: str
@@ -179,7 +182,7 @@ class Recipies:
 
     circuit_a = Recipe("Electronic Circuit", {RS.assembler: -0.5, RS.copper_cable: -3, RS.iron_plate: -1,                       RS.circuit_a: 1})
     circuit_b = Recipe("Advanced Circuit",   {RS.assembler: -6,   RS.copper_cable: -4, RS.circuit_a:  -2, RS.plastic:       -2, RS.circuit_b: 1})
-    circuit_c = Recipe("Processing Unit",    {RS.assembler: -10,  RS.circuit_b:    -2, RS.circuit_a: -20, RS.sulfuric_acid: -5, RS.circuit_c: 1})
+    circuit_c = Recipe("Processing Unit",    {RS.assembler: -10,  RS.circuit_a:    -2, RS.circuit_b: -20, RS.sulfuric_acid: -5, RS.circuit_c: 1})
 
     # logistics
     belt_y     = Recipe("Transport Belt", {RS.assembler: -0.5,                   RS.iron_gear: -1, RS.iron_plate: -1, RS.belt_y:     2})
@@ -243,7 +246,7 @@ class Recipies:
     science_blue   = Recipe("Chemical Science Pack",   {RS.assembler: -24, RS.sulfur: -1, RS.circuit_b: -3, RS.engine_unit: -2, RS.science_blue: 2})
     science_purple = Recipe("Production Science Pack", {RS.assembler: -21, RS.rail: -30, RS.electric_furnace: -1, RS.module_productivity: -1, RS.science_purple: 3})
     science_yellow = Recipe("Utility Science Pack",    {RS.assembler: -21, RS.circuit_c: -2, RS.flying_robot_frame: -1, RS.low_density_structure: -3, RS.science_yellow: 3})
-    science_white  = Recipe("Space Science Pack",      {RS.rocket_part: -100, RS.sattelite: -1, RS.science_white: 1})
+    science_white  = Recipe("Space Science Pack",      {RS.rocket_part: -100, RS.sattelite: -1, RS.science_white: 1000})
 
 T = tp.TypeVar("T")
 def props(cls: type, _t: type[T]) -> list[T]:
@@ -255,4 +258,14 @@ for resource in props(RS, Resource):
 
 # TODO: draw recipe graph
 
+target = {
+    RS.science_red:    1,
+    RS.science_green:  1,
+    RS.science_gray:   1,
+    RS.science_blue:   1,
+    RS.science_purple: 1,
+    RS.science_yellow: 1,
+}
+
 breakpoint()  # michael
+# fmt: on
diff --git a/calc2.py b/calc2.py
new file mode 100644
index 0000000..4567458
--- /dev/null
+++ b/calc2.py
@@ -0,0 +1,140 @@
+recipies: dict[str, dict[str, float]] = {
+    # mining
+    'iron-ore': {'mining-drill': -1, 'iron-ore': 0.5},
+    'copper-ore': {'mining-drill': -1, 'copper-ore': 0.5},
+    'stone': {'mining-drill': -1, 'stone': 0.5},
+    'coal': {'mining-drill': -1, 'coal': 0.5},
+    'uranium-ore': {'mining-drill': -1, 'sulfuric-acid': -0.25, 'uranium-ore': 0.5},
+    # oil
+    'basic-oil-processing': {'oil-refinery': -5, 'crude-oil': -100, 'petroleum-gas': 45},
+    'advanced-oil-processing': {
+        'oil-refinery': -5,
+        'crude-oil': -100,
+        'water': -50,
+        'petroleum-gas': 55,
+        'light-oil': 45,
+        'heavy-oil': 25,
+    },
+    'coal-liquefaction': {
+        'oil-refinery': -5,
+        'coal': -10,
+        'steam': -50,
+        'petroleum-gas': 10,
+        'light-oil': 20,
+        'heavy-oil': -25 + 90,
+    },
+    'heavy-oil-craking': {'chemical-plant': -2, 'heavy-oil': -40, 'water': -30, 'light-oil': 30},
+    'light-oil-craking': {'chemical-plant': -2, 'light-oil': -30, 'water': -30, 'petroleum-gas': 20},
+    # fuel
+    'solid-fuel-pg': {'chemical-plant': -2, 'petroleum-gas': -20, 'solid-fuel': 1},
+    'solid-fuel-lo': {'chemical-plant': -2, 'light-oil': -10, 'solid-fuel': 1},
+    'solid-fuel-ho': {'chemical-plant': -2, 'heavy-oil': -20, 'solid-fuel': 1},
+    'rocket-fuel': {'assembler': -30, 'light-oil': -10, 'solid-fuel': -10, 'rocket-fuel': 1},
+    # smelting
+    'iron-plate': {'furnace': -3.2, 'iron-ore': -1, 'iron-plate': 1},
+    'copper-plate': {'furnace': -3.2, 'copper-ore': -1, 'copper-plate': 1},
+    'stone-brick': {'furnace': -3.2, 'stone': -1, 'stone-brick': 1},
+    'steel': {'furnace': -16, 'iron-plate': -5, 'steel': 1},
+    # crafting basics
+    'iron-gear': {'assembler': -0.5, 'iron-plate': -2, 'iron-gear': 1},
+    'iron-stick': {'assembler': -0.5, 'iron-plate': -1, 'iron-stick': 2},
+    'pipe': {'assembler': -0.5, 'iron-plate': -1, 'pipe': 1},
+    'copper-cable': {'assembler': -0.5, 'copper-plate': -1, 'copper-cable': 2},
+    # circuits
+    'circuit-a': {'assembler': -0.5, 'copper-cable': -3, 'iron-plate': -1, 'circuit-a': 1},
+    'circuit-b': {'assembler': -6, 'copper-cable': -4, 'circuit-a': -2, 'plastic': -2, 'circuit-b': 1},
+    'circuit-c': {'assembler': -10, 'circuit-a': -2, 'circuit-b': -20, 'sulfuric-acid': -5, 'circuit-c': 1},
+    # logistics
+    'belt-y': {'assembler': -0.5, 'iron-gear': -1, 'iron-plate': -1, 'belt-y': 2},
+    'inserter-y': {'assembler': -0.5, 'circuit-a': -1, 'iron-gear': -1, 'iron-plate': -1, 'inserter-y': 1},
+    # transport
+    'concrete': {'assembler': -10, 'iron-ore': -1, 'stone-brick': -5, 'water': -100, 'concrete': 10},
+    'rail': {'assembler': -0.5, 'iron-stick': -1, 'steel': -1, 'stone': -1, 'rail': 1},
+    # chemicals
+    'sulfur': {'chemical-plant': -1, 'petroleum-gas': -30, 'water': -30, 'sulfur': 2},
+    'sulfuric-acid': {'chemical-plant': -1, 'iron-plate': -1, 'sulfur': -5, 'water': -100, 'sulfuric-acid': 50},
+    'plastic': {'chemical-plant': -1, 'coal': -1, 'petroleum-gas': -20, 'plastic': 2},
+    'explosives': {'chemical-plant': -4, 'coal': -1, 'sulfur': -1, 'water': -10, 'explosives': 2},
+    'battery': {'chemical-plant': -4, 'copper-plate': -1, 'iron-plate': -20, 'sulfuric-acid': -20, 'battery': 1},
+    # military
+    'magazine-y': {'assembler': -1, 'iron-plate': -4, 'magazine-y': 1},
+    'magazine-r': {'assembler': -1, 'copper-plate': -5, 'magazine-y': -1, 'steel': -1, 'magazine-r': 1},
+    'grenade': {'assembler': -8, 'coal': -10, 'iron-plate': -5, 'grenade': 1},
+    'wall': {'assembler': -0.5, 'stone-brick': -5, 'wall': 1},
+    'rocket-y': {'assembler': -8, 'circuit-a': -1, 'explosives': -1, 'iron-plate': -2, 'rocket-y': 1},
+    'rocket-r': {'assembler': -8, 'explosives': -2, 'rocket-r': 1},
+    # intermediates
+    'engine-unit': {'assembler': -10, 'iron-gear': -1, 'pipe': -2, 'steel': -1, 'engine-unit': 1},
+    'engine-unit-electric': {
+        'assembler': -10,
+        'circuit-a': -2,
+        'engine-unit': -1,
+        'lubricant': -15,
+        'engine-unit-electric': 1,
+    },
+    'accumulator': {'assembler': -10, 'battery': -5, 'iron-plate': -2, 'accumulator': 1},
+    'solar-panel': {'assembler': -10, 'copper-plate': -5, 'circuit-a': -15, 'steel': -5, 'solar-panel': 1},
+    'electric-furnace': {'assembler': -5, 'circuit-b': -5, 'steel': -10, 'stone-brick': -10, 'electric-furnace': 1},
+    'flying-robot-frame': {
+        'assembler': -20,
+        'battery': -2,
+        'engine-unit-electric': -1,
+        'circuit-a': -3,
+        'steel': -1,
+        'flying-robot-frame': 1,
+    },
+    'low-density-structure': {
+        'assembler': -20,
+        'copper-plate': -20,
+        'plastic': -5,
+        'steel': -2,
+        'low-density-structure': 1,
+    },
+    # modules
+    'module-productivity': {'assembler': -15, 'circuit-b': -5, 'circuit-a': -5, 'module-productivity': 1},
+    'module-speed': {'assembler': -15, 'circuit-b': -5, 'circuit-a': -5, 'module-speed': 1},
+    # end-game
+    'rocket-control-unit': {'assembler': -30, 'circuit-c': -1, 'module-speed': -1, 'rocket-control-unit': 1},
+    'rocket-part': {
+        'rocket-silo': -3,
+        'low-density-structure': -10,
+        'rocket-control-unit': -10,
+        'rocket-fuel': -10,
+        'rocket-part': 1,
+    },
+    'sattelite': {
+        'assembler': -5,
+        'accumulator': -100,
+        'low-density-structure': -100,
+        'circuit-c': -100,
+        'radar': -5,
+        'rocket-fuel': -50,
+        'solar-panel': -100,
+        'sattelite': 1,
+    },
+    # science packs
+    'science-red': {'assembler': -5, 'copper-plate': -1, 'iron-gear': -1, 'science-red': 1},
+    'science-green': {'assembler': -6, 'belt-y': -1, 'inserter-y': -1, 'science-green': 1},
+    'science-gray': {'assembler': -10, 'magazine-r': -1, 'grenade': -1, 'wall': -2, 'science-gray': 2},
+    'science-blue': {'assembler': -24, 'sulfur': -1, 'circuit-b': -3, 'engine-unit': -2, 'science-blue': 2},
+    'science-purple': {
+        'assembler': -21,
+        'rail': -30,
+        'electric-furnace': -1,
+        'module-productivity': -1,
+        'science-purple': 3,
+    },
+    'science-yellow': {
+        'assembler': -21,
+        'circuit-c': -2,
+        'flying-robot-frame': -1,
+        'low-density-structure': -3,
+        'science-yellow': 3,
+    },
+    'science-white': {'rocket-part': -100, 'sattelite': -1, 'science-white': 1000},
+}
+
+resources = {resource for _, resources in recipies.items() for resource, quantity in resources.items() if quantity > 0}
+
+print(f'{resources=}')
+breakpoint()  # michael
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..5a4d111
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,5 @@
+[tool.ruff]
+line-length = 120
+
+[tool.ruff.format]
+quote-style = 'single'