my code: any recommendations to improve it?

const product = {
  name: 'chair',
  inventory: 20,
  unit_price: 45.99
};

addInventory = (prod, add) => {
  prod.inventory += add;
  console.log(`${add} ${prod.name}s added to the inventory.`);
  console.log(`The inventory now has ${prod.inventory} ${prod.name}s in stock.`);
}

addInventory(product, 8);

processSale = (prod, sold) => {
  prod.inventory -= sold;
  let sales = sold * prod.unit_price;
  let totalValue = prod.inventory * prod.unit_price;
  console.log(`${sold} ${prod.name}s sold for an ammount of $${sales.toFixed(2)}`);
  console.log(`The inventory now has ${prod.inventory} ${prod.name}s in stock with a total value of $${totalValue.toFixed(2)}.`);
}
processSale(product, 6);