HSAH shall keep proper books of account and records containing complete information relating to Products purchased and sold by HSAH, including the names of customers, the quantities purchased and the terms of each sale. HSAH shall also have in its files at all times copies of valid resale licenses of its customers if required in the Territory. HSAH’s failure to maintain such valid resale licenses in its files will render HSAH liable for any and all taxes, fees, penalties and interest that may be assessed by any taxing authorities arising from such failure.