YES! Thank you Brian. This works!!
AdjTotal: (IIf([ProdBatch_Type] Like 'Batter*',[ProdBatch_Weight]*[ProdBatch_Number_Batches]*0.9,IIf([ProdBatch_Type]="donut",[ProdBatch_Weight]*[ProdBatch_Number_Batches]*1.31,[ProdBatch_Weight]*[ProdBatch_Number_Batches]))