Buyer shall pay to PMAD, in immediately available funds, the total amount due with respect to each Invoice prior to or concurrently with the earlier of (i) Buyer’s retrieval and pick-up of the Goods to which such Invoice applies, and (ii) fifteen (15) days following the date of the applicable Invoice (the “Invoice Due Date”). PMAD shall not be required to release any Goods ordered hereunder to Buyer with respect to which PMAD has not received payment in full, in immediately available funds, of the total amount due therefor pursuant to the applicable Invoice. All amounts which remain unpaid following the Invoice Due Date will accrue interest at the per annum rate of eighteen percent (18%), prorated daily.