Undistributed Amt - Rollup

A calculated field that displays the difference between the [Amount] and the sum of the [Distributed Amt.] from each Lot that a cost amount has been distributed to. This is calculated on Save to show how much of the original 'Amount' must still be distributed before the transaction can be posted. This is a non-editable text box that can only be changed by distributing to one or more Lots.