mapFormatCurrency.js

const sales = [ 
  { name: 'João', amount: 11792.23, currency: 'BRL', country: 'Brazil', language: 'pt-BR' },
  { name: 'Manoel', amount: 3899.05, currency: 'EUR', country: 'Portugal', language: 'pt-PT' }, 
  { name: 'José', amount: 259, currency: "USD", country: 'United States', language: 'en-US' } 
] 

const formatCurrency = ({ amount, language, currency }) => {
  return {
    amountFormatted: amount.toLocaleString(language, { style: 'currency', currency: currency })
  }
}


const amountWithCurrency = sales.map(formatCurrency)