unit variance amount(The amount of variance between the invoice net unit price and the purchase order net unit price when invoice lines and purchase order lines are compared)
purchase order net unit price(The expected currency amount per unit that is represented by the purchase order, calculated as follows: Purchase order line net amount / Quantity on the purchase order)
invoice net unit price(The actual currency amount per unit that is represented by the vendor invoice, calculated as follows: Invoice line net amount / Quantity on the invoice)