section Merchant Actions
  description   The actions for the Merchant.
  action receives-cash The merchant receives the amount to pay in cash
  action inform-amount The merchant tells the customer what to pay
  action enters-amount The merchant enters the amount in the terminal r this is automatic via the cash register
  action retry-payment The customer has to pay differently
  action goods-left-behind The customer cannot pay and leaves the goods behind
  action goods-given The good are given to the customer
  component Merchant Represents a merchant.