Here is an example of how entering more than 1 invoice to a single shipment can occur and what you would see in the application from a cost perspective when it does occur.
1. On the Transactions menu, point to Purchasing, and then click Purchase Order Entry to enter a PO for quantity 100 at $250 unit cost.
2. On the Transactions menu, point to Purchasing, and then click Receivings Transaction Entry. Enter a shipment receipt for a quantity of 100 and a $250 unit cost. Post to create a receipt line with a unit cost of $250.
3. On the Transactions menu, point to Purchasing, and then click Enter/Match Invoices. Enter an invoice to match to the shipment for a partial quantity of 70 at a unit cost of $280. Post.
4. At this point the unit cost value of that receipt line with quantity of 100 is $280. To review this information open the Purchase Receipts Inquiry. To do this, on the Inquiry menu, point to Inventory, and then click Receipts.
5. Due to an arrangement with your vendor, you will not be invoiced for the remaining 30 items so you decide to enter in another invoice for $0. On the Transactions menu point to Purchasing, and then click Enter/Match Invoices. Enter an invoice to match to the shipment for the remaining quantity of 30 at a unit cost of $0. Post.
Note Starting on Microsoft Dynamics GP 2010 SP3, you will receive the following message when you tab off the Unit Cost field and it differs from the cost used for the PO's shipment. This is to alert you of what will be happening to the full receipt quantity. (This warning does not apply to items with an Average Perpetual valuation method.)
The cost of the invoice does not match the purchase receipt cost. Posting updates the total quantity of the purchase receipt with this cost and your inventory and general ledger will not balance. Do you want to continue?
6. The cost of the receipt line with quantity of 100 is now $0.
Note The value of this item in the inventory module and on the Historical Inventory Trial Balance (HITB) report is $0. However the inventory account in General Ledger will have the $19,600 (70 x $280) balance from the first shipment. A journal entry in General Ledger can be posted to credit the balance in the inventory account in order to tie General Ledger to Inventory. Or, if you want the unit cost to be $196 ($19,600 \ 100), then use the Adjust Cost Utility to change the cost on that receipt from $0 to $196 and do not post the automatic adjustment that is created through General Ledger.