Which one of the following statements concerning cash discounts is correct?

The cost of not taking a 2/10, net 30 cash discount is usually less than the prime rate.
With trade terms of 2/15, net 60, if the discount is not taken, the buyer receives 45 days of free credit.
The cost of not taking the discount is higher for terms of 2/10, net 60 than for 2/10, net 30.
The cost of not taking a cash discount is generally higher than the cost of a bank loan.