Practice with Object methods:
let inventory = {
apples: 50,
bananas: 30,
oranges: 45
}
// All keys
console.log(Object.keys(inventory))
// ["apples", "bananas", "oranges"]
// Total count
let total = Object.values(inventory).reduce((a, b) => a + b, 0)
console.log(total) // 125
// Transform to array of objects
let items = Object.entries(inventory).map(([name, qty]) => ({ name, qty }))
console.log(items)