Question is incomplete. I will try to answer to the best of my ability.
Answer and Explanation:
The credit terms '3/15, n/60' and '2/10, n/30' mentioned in the question signifies the terms in which riverbed has sold its product to the buyer.
3/15, n/60 means that if the buyer pays with 15 days since the transaction takes place then the buyer would receive 3% on the receivable.
However, if they fail to pay within 15 days then the buyer would have to pay the full amount within 60 days.
Similarly, 2/10, n/30 means 2% discount within 10 days since the transaction took place. Otherwise full payment after 10 day.