public void RemoveSales(SalesRecords sr) { SalesRecords.Remove(sr); }
public void AddSales(SalesRecords sr) { SalesRecords.Add(sr); }
public void RemoveSeller(SalesRecords sr) { Sales.Remove(sr); }
public double TotalSales(DateTime initial, DateTime final) { return(SalesRecords.Where(s => s.Date >= initial && s.Date <= final).Sum(s => s.Amount)); }
public void AddSeller(SalesRecords sr) { Sales.Add(sr); }