10UMLClass45020010030CustomerUMLClass31010010030CashierUMLClass5052010080Item -- id: String name: String unitPriceUMLClass5033010030CartRelation8035040190lt=<<<<- m2=*10;10;10;170UMLClass270340180100Bill -- id total tax cashByCustomer balanceUMLClass31053010040LineItem -- quantity: intRelation35043040120lt=<<<<<- m2=*10;10;10;100UMLClass6010012030PointOfSaleSystemRelation14054019040lt=<- m1=110;10;170;10