The POs and Invoice Details tab keeps track of the Purchase Orders this invoice is for and links the Invoice Line items to the PO line items.
A sample of the grids appear below. Sort records in a grid by clicking on the headings. An up or down arrow (highlighted in orange below) will appear signifying ascending or descending order.
Purchase Orders grid
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Invoice Details grid
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How To Add a purchase order

Note: Only Purchase Orders that have the same vendor as the Invoice will appear.
  | 
Field Name  | 
Special Function  | 
  | 
PO Amount  | 
Automatically comes from the Amount field on the Purchase Order.  | 
  | 
Previously Invoiced  | 
Automatically filled with sum of all Invoiced Amounts from invoices previously attached to the PO  | 
  | 
Invoice Total  | 
Automatically filled with the sum of all Invoiced Total Cost fields from the Invoice Detail records. (shown below)  | 
  | 
Remaining Amount  | 
The difference between the Previously Invoiced field and the Invoiced Total field.  | 
  | 
Retainage  | 
Enter the amount of money to be retained from this invoice until the project is complete.  | 
How To Add an Invoice Detail Record

  | 
Invoice Detail field  | 
PO > Line Item field  | 
  | 
Product Description  | 
Product Description  | 
  | 
PO Units  | 
Quantity  | 
  | 
Unit of Measure  | 
Unit of Measure  | 
  | 
PO Unit Cost  | 
Unit Price  | 
  | 
PO Total Cost  | 
Total Price  | 
  | 
Field Name  | 
Function  | 
  | 
Invoice Total Cost  | 
The product of Invoice Units x PO Unit Cost  | 
  | 
Remain Units  | 
The difference of PO Units - Previous Units - Invoice Units  | 
  | 
Remaining Total Cost  | 
The difference of PO Total Cost - Previous Total Cost - Invoice Total Cost  |