(from WesBos Advanced React and GraphQL course)[https://advancedreact.com/]
export default function(amount) {
const options = {
style: 'currency',
currency: 'USD',
minimumFractionDigits: 2,
};
// if its a whole, dollar amount, leave off the .00
if (amount % 100 === 0) options.minimumFractionDigits = 0;
const formatter = new Intl.NumberFormat('en-US', options);
return formatter.format(amount / 100);
}