diff --git a/server/AyaNova/biz/PurchaseOrderBiz.cs b/server/AyaNova/biz/PurchaseOrderBiz.cs
index c511342b..13991899 100644
--- a/server/AyaNova/biz/PurchaseOrderBiz.cs
+++ b/server/AyaNova/biz/PurchaseOrderBiz.cs
@@ -268,89 +268,110 @@ namespace AyaNova.Biz
 
         ////////////////////////////////////////////////////////////////////////////////////////////////
         //BIZ ACTIONS
+        //A PO can now be edited in any way user wishes at any time so this method is to fix up 
+        //any changes they make in affected objects and inventory
         //
-
         private async Task BizActionsAsync(AyaEvent ayaEvent, PurchaseOrder proposedObj, PurchaseOrder currentObj, IDbContextTransaction transaction)
         {
-            //TODO: BIZ ACTIONS TO FIXUP INVENTORY ON CHANGES ETC
-
-            //If received now less than before need to take out of inventory
-            //If received now more than before need to put into inventory
-
             //MIGRATE_OUTSTANDING - woitempart request update
             //if received on woitempartrequest then need to update woitempartrequest (notification separate not a concern here)
             //if workorderitempartrequest item removed, need to fixup woitempartrequest
+            //BUT *only* if the woitempartrequest still exists and isn't completed already
 
             PartInventoryBiz pib = new PartInventoryBiz(ct, UserId, UserTranslationId, CurrentUserRoles);
 
             switch (ayaEvent)
             {
                 case AyaEvent.Created:
-                    //any received go into inventory
-                    var inventoryAffectingItems = proposedObj.Items.Where(z => z.QuantityReceived > 0).ToList();
-                    foreach (var poItem in inventoryAffectingItems)
                     {
-                        //make inventory adjustment here
-                        dtPOPartInventory i = new dtPOPartInventory();
-                        i.PartId = poItem.PartId;
-                        i.PartWarehouseId = poItem.PartWarehouseId;
-                        i.Quantity = poItem.QuantityReceived;
-                        i.SourceType = AyaType.PurchaseOrder;
-                        i.SourceId = proposedObj.Id;
-                        await pib.CreateAsync(i);
-
-                        //MIGRATE_OUTSTANDING - update workorderitempart here if applicable
-                    }
-                    break;
-                case AyaEvent.Modified:
-                    //any changes that will affect inventory get processed here
-                    foreach (var propPOItem in proposedObj.Items)
-                    {
-                        //get the matching currentPoItem
-                        var currentPOItem = currentObj.Items.FirstOrDefault(z => z.Id == propPOItem.Id);
-                        //NEW ITEM?
-                        if (currentPOItem == null && propPOItem.QuantityReceived > 0)
+                        //any received go into inventory
+                        var inventoryAffectingItems = proposedObj.Items.Where(z => z.QuantityReceived > 0).ToList();
+                        foreach (var poItem in inventoryAffectingItems)
                         {
-                            //It's a new receipt from before, add to inventory
+                            //make inventory adjustment here
                             dtPOPartInventory i = new dtPOPartInventory();
-                            i.PartId = propPOItem.PartId;
-                            i.PartWarehouseId = propPOItem.PartWarehouseId;
-                            i.Quantity = propPOItem.QuantityReceived;
+                            i.PartId = poItem.PartId;
+                            i.PartWarehouseId = poItem.PartWarehouseId;
+                            i.Quantity = poItem.QuantityReceived;
                             i.SourceType = AyaType.PurchaseOrder;
                             i.SourceId = proposedObj.Id;
                             await pib.CreateAsync(i);
 
                             //MIGRATE_OUTSTANDING - update workorderitempart here if applicable
                         }
-                        //UPDATED ITEM WITH NEW RECEIVED AMOUNT?
-                        else if (currentPOItem.QuantityReceived != propPOItem.QuantityReceived)
+                    }
+                    break;
+                case AyaEvent.Modified:
+                    {
+                        //any changes that will affect inventory get processed here
+                        foreach (var newItem in proposedObj.Items)
                         {
-                            decimal netChange = 0;
-
-                            if (currentPOItem.QuantityReceived < propPOItem.QuantityReceived)
+                            //get the matching currentPoItem
+                            var oldItem = currentObj.Items.FirstOrDefault(z => z.Id == newItem.Id);
+                            //NEW ITEM?
+                            if (oldItem == null && newItem.QuantityReceived > 0)
                             {
-                                //More received
-                                netChange = propPOItem.QuantityReceived - currentPOItem.QuantityReceived;
-                            }
-                            else
-                            {
-                                //less received 
-                                netChange = propPOItem.QuantityReceived - currentPOItem.QuantityReceived;
-                            }
+                                //It's a new receipt with received amounts - add to inventory
+                                dtPOPartInventory i = new dtPOPartInventory();
+                                i.PartId = newItem.PartId;
+                                i.PartWarehouseId = newItem.PartWarehouseId;
+                                i.Quantity = newItem.QuantityReceived;
+                                i.SourceType = AyaType.PurchaseOrder;
+                                i.SourceId = proposedObj.Id;
+                                await pib.CreateAsync(i);
 
+                                //MIGRATE_OUTSTANDING - update workorderitempart here if applicable
+                            }
+                            //UPDATED ITEM WITH NEW RECEIVED AMOUNT?
+                            else if (oldItem.QuantityReceived != newItem.QuantityReceived)
+                            {
+                                decimal netChange = 0;
+                                if (oldItem.QuantityReceived < newItem.QuantityReceived)
+                                {
+                                    //More received
+                                    netChange = newItem.QuantityReceived - oldItem.QuantityReceived;
+                                }
+                                else
+                                {
+                                    //less received 
+                                    netChange = newItem.QuantityReceived - oldItem.QuantityReceived;
+                                }
+
+                                dtPOPartInventory i = new dtPOPartInventory();
+                                i.PartId = newItem.PartId;
+                                i.PartWarehouseId = newItem.PartWarehouseId;
+                                i.Quantity = netChange;
+                                i.SourceType = AyaType.PurchaseOrder;
+                                i.SourceId = proposedObj.Id;
+                                await pib.CreateAsync(i);
+
+                                //MIGRATE_OUTSTANDING - update workorderitempart here if applicable
+                            }
 
                         }
-
-
-
                     }
                     break;
                 case AyaEvent.Deleted:
+                    {
+                        //REVERSE ENTIRE PO
+                        //any received remove from inventory
+                        var inventoryAffectingItems = currentObj.Items.Where(z => z.QuantityReceived > 0).ToList();
+                        foreach (var poItem in inventoryAffectingItems)
+                        {
+                            //make reversing inventory adjustment here
+                            dtPOPartInventory i = new dtPOPartInventory();
+                            i.PartId = poItem.PartId;
+                            i.PartWarehouseId = poItem.PartWarehouseId;
+                            i.Quantity = poItem.QuantityReceived *= -1;
+                            i.SourceType = AyaType.PurchaseOrder;
+                            i.SourceId = proposedObj.Id;
+                            await pib.CreateAsync(i);
+
+                            //MIGRATE_OUTSTANDING - update workorderitempart here if applicable
+                        }
+                    }
                     break;
             }
-
-
-
         }