// Seu código original
function calcularTotal(itens) {
  return itens.reduce((total, item) => {
    return total + item.preco;
  }, 0);
}

// Após ofuscação com Ofuscador
const _0x3b2f=['reduce'];(function(_0x2c0c8a,_0x3b2f1d){const _0x1d9f8c=function(_0x42d99a){while(--_0x42d99a){_0x2c0c8a['push'](_0x2c0c8a['shift']());}};_0x1d9f8c(++_0x3b2f1d);}(_0x3b2f,0x1d9));const _0x1d9f=function(_0x2c0c8a,_0x3b2f1d){_0x2c0c8a=_0x2c0c8a-0x0;let _0x1d9f8c=_0x3b2f[_0x2c0c8a];return _0x1d9f8c;};function calcularTotal(_0x42d99a){return _0x42d99a[_0x1d9f('0x0')]((_0x2f8619,_0x3a89c9)=>{return _0x2f8619+_0x3a89c9['preco'];},0x0);}