const items = [
  { name: "banana", price: 1.5, qty: 10 },
  { name: "apple",  price: 1.5, qty: 5  },
  { name: "cherry", price: 3.0, qty: 8  },
  { name: "date",   price: 2.0, qty: 8  },
];

const sorted = [...items].sort((a, b) => {
  if (a.price !== b.price) return a.price - b.price;
  if (a.qty   !== b.qty)   return b.qty   - a.qty;
  return a.name.localeCompare(b.name);
});

console.log(sorted.map(i => `${i.name}:${i.qty}`).join(", "));