bundle update pseudocode

        $inventoryParent = Inventories::find($existingInventory['ItemMasterId']);
        $inventoryParent->update($existingInventory['inventory']);
        $existingInventory2 = InventoryBranches::with('inventory','legalEntity', 'branch')->find($itemId);
        $existingInventory2->Quantity100 = $request->Quantity100;
        $existingInventory2->Quantity90 = $request->Quantity90;
        $existingInventory2->Quantity60 = $request->Quantity60;
        $existingInventory2->Quantity30 = $request->Quantity30;
        $existingInventory2->save();