Means of payment were not well known by the candidates.  Some answers expected include:

• Credit Card
• Vouchers (luncheon, fuel etc)
• Stamps
• Bills of Exchange etc.

The part ‘b’ of the question was not also well attempted.

• Quotation is the statement of current prices of products or services and also a reply to an enquiry.
• Deferred payment is applicable to credit sales and seller transfers ownership of the goods to the buyer immediately.
• Quantity discount: It is a reduction in the catalogue price of goods sold. It is given to encourage bulk purchase.