void mAveCost_Click(object sender, EventArgs e)
{
frmSingleInputBox fsAvecost = new frmSingleInputBox("Enter the new average cost...", ref sEngine);
fsAvecost.ShowDialog();
if (fsAvecost.Response != "$NONE")
{
sEngine.EditAverageCostOfItem(sBarcode, sShopCode, fsAvecost.Response);
ShowStatsAboutProduct();
}
}
