ES6 - Use the Rest Parameter with Function Parameters

Tell us what’s happening:
Describe your issue in detail here.
There are problem, i the last rule whitch i must to do is that it must be arrow func but it is already arrow so what i must to do?
Your code so far

const sum = (...number) => {
  const args = [...number];
  let total = 0;
  for (let i = 0; i < args.length; i++) {
    total += args[i];
  }
  return total;
}

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Challenge: ES6 - Use the Rest Parameter with Function Parameters

Link to the challenge:

Test is expecting the to use the args name for the rest parameter.