anchor.diff:  	PackageSize = 5000000 + rand:uniform(9000000),
   	PackageUnits = octets,
   	P1 = price(usage, PackageUnits, PackageSize, PackagePrice),
  -	OfferId = add_offer([P1], 4),
  +	OfferId = add_offer([P1], 8),
   	ProdRef = add_product(OfferId),
   	ServiceId = add_service(ProdRef),
   	RemAmount1 = 233,
  
positive.code: 	PackageSize = 5000000 + rand:uniform(9000000),
  	PackageUnits = octets,
  	P1 = price(usage, PackageUnits, PackageSize, PackagePrice),
  	OfferId = add_offer([P1], 4),
  	ProdRef = add_product(OfferId),
  	ServiceId = add_service(ProdRef),
  	RemAmount1 = (2 * PackagePrice) + rand:uniform(PackagePrice - 1),
  
negative.code: 	PackageSize = 5000000 + rand:uniform(9000000),
  	PackageUnits = octets,
  	P1 = price(usage, PackageUnits, PackageSize, PackagePrice),
  	OfferId = add_offer([P1], 8),
  	ProdRef = add_product(OfferId),
  	ServiceId = add_service(ProdRef),
  	RemAmount = 100,
  