Nelson is hoping to buy some snack food in bulk for a student end-of-term party, and visits a local wholesale supplier with the idea of making some bargain purchases. He wants to sell the snacks at the party and then pay the wholesaler for them at a later date. He asks the wholesaler for a discount. However, the wholesaler tells him that he cannot offer either a cash nety to place repede vast or trade discount in the circumstances. Explain