const obj = {
    id: 53,
    date: "2021-10-20",
    items: [
        {
            description: "Celular",
            price: 1499.99,
            quantity: 1
        },
        {
            description: "Mouse",
            price: 100.0,
            quantity: 2
        }
    ],
    client: {
        name: "Maria Red",
        email: "maria@gmail.com",
        active: true
    }
};
 
const { id, date } = obj;
 
console.log(id);
console.log(date);
 
function subTotal( { price, quantity } ) {
    return price * quantity;
}
 
console.log(subTotal(obj.items[0]));
console.log(subTotal(obj.items[1]));
 
function total( {items} ) {
    let soma = 0;
    for (let i=0; i<items.length; i++) {
        soma = soma + subTotal(items[i]);
    }
    return soma;
}
 
console.log(total(obj));
 
const [item1, item2] = obj.items;
 
console.log(item1);
console.log(item2);