Does not fire on the Weight or Units DataColumns....
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<DropShadowEffect BlurRadius="0" ShadowDepth="2" />
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<telerikPresentation:GridViewComboBoxColumn DisplayMemberPath="comm_name" SelectedValueMemberPath="comm_name" DataMemberBinding="{Binding comm_name, Mode=TwoWay}" Header="Commodity" Width="235" />
<telerikPresentation:GridViewDataColumn x:Name="weight" LostFocus="weight_LostFocus" DataMemberBinding="{Binding weight, Mode=TwoWay}" Header="Weight" Width="95" />
<telerikPresentation:GridViewDataColumn x:Name="units" LostFocus="units_LostFocus_1" DataMemberBinding="{Binding bale_cnt, Mode=TwoWay}" Header="Units" Width="95" />
<telerikPresentation:GridViewDataColumn DataMemberBinding="{Binding sale_pt, Mode=TwoWay}" Header="Sale P/T" Width="95" DataFormatString="{}{0:C}"/>
<telerikPresentation:GridViewDataColumn DataMemberBinding="{Binding purc_pt, Mode=TwoWay}" Header="Pur. P/T" Width="95" DataFormatString="{}{0:C}" />
<telerikPresentation:GridViewDataColumn DataMemberBinding="{Binding sale, Mode=TwoWay}" Background="Yellow" IsReadOnly="True" Header="Sale Tot." DataFormatString="{}{0:C}" Width="95" />
<telerikPresentation:GridViewDataColumn DataMemberBinding="{Binding cost, Mode=TwoWay}" Background="Yellow" IsReadOnly="True" Header="Pur. Tot." DataFormatString="{}{0:C}" Width="95" />
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