All invoices are due and payable within the specified number of days on the invoice from the date of the invoice. By accepting the products herein, and in the event this invoice is not timely paid, customer agrees to pay interest on any delinquent amount(s) at the rate of 1.5% per month. In the event of non-payment, customer agrees to pay all collection costs and attorney fees. The parties agree that the dispute will be handled under NH law.