Usually, the supplier will send a Bill to the buyer at the same time that the products are being shipped, although that may be different per scenario of the game (in some scenarios payment is asked in advance, in some scenarios payment has to be done at the delivery moment, and in some scenarios a bill might be sent late). A bill will have a payment period. Hopefully, the buyer is able to pay the bill by sending a Payment on time.

Bill properties

The Bill has the following properties:

• Order
  The underlying Order to which the bill belongs (not changeable)
• Price
  The total price that the supplier has to pay for the overall order (not changeable)
• Payment date
  The final date when the payment has to arrive at the supplier (not changeable)