如何在mongoose中返回json对象和合计？

const mongoose = require('mongoose');

const productSchema = new mongoose.Schema({
  name: String,
  price: Number,
  quantity: Number
});

const Product = mongoose.model('Product', productSchema);

Product.find({}, (err, products) => {
  if (err) {
    console.log(err);
    return;
  }
  
  const totalPrice = products.reduce((sum, product) => sum + product.price * product.quantity, 0);
  
  const response = {
    products: products,
    totalPrice: totalPrice
  };
  
  console.log(response);
});