If the credit terms on a sales invoice read “2/10, n/30”, what does this mean? a : the buyer should pay within the credit period but should not invest the cash while waiting to pay the bill. b : the buyer should recognize that the supplier is desperate for cash and withhold payment until the end of the credit period while negotiating a lower sales price. c : the buyer should pay within the discount period and recognize a savings. d : the buyer should hold off on paying the bill until the end of the credit period while investing the money at 10% annual interest during this time.