Each manufacturer of frozen desserts and frozen dessert mix shall keep, in the form prescribed by the Commissioner of Consumer Protection, for each frozen dessert and frozen dessert mix plant operated by him, a true and correct record showing milk and milk products received and frozen dessert and frozen dessert mix manufactured. Such record shall show, among other things, (1) as to milk products received, (A) the date of receipt, (B) the weight or volume, (C) the kind of milk product or mixture containing a milk product, (D) the percentage of milk fat contained therein and (E) the name and address of the person from whom purchased or obtained; (2) as to frozen desserts and frozen dessert mix manufactured, (A) the date, (B) the volume, (C) the class of frozen desserts and frozen dessert mix and (D) the average percentage of milk fat contained therein. Not later than the tenth day of each month, an inventory shall be prepared showing the amount of each kind of milk product, mixture containing a milk product and frozen desserts and frozen dessert mix on hand, as of the last day of the preceding month. The records required by this section shall be legibly written in English, shall be preserved at the frozen dessert or frozen dessert mix plant for a period of six months and shall be open at all times for inspection by the Commissioner of Consumer Protection or his representatives.