private void Sell()
{
int numberOfUnits = _consoleView.DisplayGetNumberOfUnitsToSell(_salesperson.CurrentStock);
_salesperson.CurrentStock.SubtractProducts(numberOfUnits);
if (_salesperson.CurrentStock.NumberOfUnits < 0)
{
_consoleView.DisplayBackorderMessage();
_salesperson.OnBackorder = true;
}
else
{
return;
}
}