this.credit = 0;

//@pausable
do {
	
	//@nonblockable
	accept(nickel:NickelSignal);

	//@nonblockable
	accept(dime:DimeSignal);

	//@nonblockable
	accept(gum:GumSignal);

	if (nickel != null) nickelAmount = 5; else nickelAmount = 0;
	if (dime != null)   dimeAmount = 10;  else dimeAmount = 0;
	if (gum != null)  gumAmount = -15; else gumAmount = 0;
	this.credit = this.credit + nickelAmount + dimeAmount + gumAmount;	
	
	this.gumDispatcher.ReceptionCredit( new Credit( credit => this.credit ) );
	} while(true);