Tariffs that have be placed on imported products by the United States Government are an additional cost that IS NOT included in the prices listed in this Workbook. Since the tariffs are temporary, vary in size and do not apply to all of our products it is recommended to contact customer service in advance of placing an order. Products that do have tariffs associated with them will be invoiced at normal net cost. An additional line will appear on the invoice listing the tariff and the total amount we are required to collect.