public void UpdateWeightLabel(Invoice invoiceSelected) { InvoiceSQLite invoiceSQLite = App.InvoiceDatabase.GetInvoiceByInvoiceID(invoiceSelected.InvoiceID); List <InvoiceSQLite> temp = new List <InvoiceSQLite>(); temp.Add(invoiceSQLite); double invoiceWeight = StockManager.CalculateStockWeight(StockManager.GetStock(temp)); if (invoiceSQLite.InvoiceType == "ACCREC") { _currentWeight -= invoiceWeight; } else { _currentWeight += invoiceWeight; } TotalWeightLabel.Text = $"{(_currentWeight):F2} Kg"; }