getCarConfig.fp.js

const hasGoodRating = rating => rating > 4;

const priceChange = conditionally({
  if: hasGoodRating,
  then: rating => 1000 * rating,
  else: () => 1000,
});

const getDescription = conditionally({
  if: hasGoodRating,
  then: () => "good car",
  else: () => "bad car",
});

function getCarConfig (car) {
  return {
    newPrice: priceChange(car.rating) + car.price,
    description: getDescription(car.rating)
  }
}

Thanks @ChrisBrownie55. Corrected.