message: half plate fix
diff: {name: "Chain Shirt", cost: 5000, availability: 1, type: "armour"},
  {name: "Scale Mail", cost: 5000, availability: 1, type: "armour"},
  {name: "Breastplate", cost: 40000, availability: 2, type: "armour"},
  - {name: "Half Plate", cost: 750000, availability: 4, type: "armour"},
  + {name: "Half Plate", cost: 75000, availability: 4, type: "armour"},
  {name: "Ring Mail", cost: 3000, availability: 2, type: "armour"},
  {name: "Chain Mail", cost: 7500, availability: 2, type: "armour"},
  {name: "Splint", cost: 20000, availability: 3, type: "armour"},
  