Two students are discussing the use of a trial balance. They wonder whether the following errors, each considered separately, would prevent the trial balance from balancing.

(a) The bookkeeper debited Cash for \(\$ 600\) and credited Wages Expense for \(\$ 600\) for payment of wages.

(b) Cash collected on account was debited to Cash for \(\$ 900\) and Fees Earned was credited for \(\$ 90\). What would you tell them?