Each purchaser shall keep a complete and accurate record of commodities handled by that purchaser and shall furnish each producer with a signed sales slip showing the amount of commodities purchased from that producer and the amount deducted by the purchaser for the promotion fund. These records shall be kept for two (2) years and shall be open to inspection at any time and without notice by the commissioner or the commissioner's representative. The commissioner may from time to time require a purchaser to submit records and reports necessary for collection of the assessment.