Sales invoices for pesticides first sold into or within this state shall show that the assessments specified in Sections 12841 and 12841.1 will be paid by the person or entity that first sold the pesticide for use in the state. All other sales invoices for pesticides sold into or within this state, except retail sales of those nonagricultural pesticides labeled only for home, industrial, or institutional use, shall show as a comment on the invoice that the assessment will be paid, and may show an amount or rate that represents the assessment. However, only the person who actually will pay the assessment may show the amount or rate of the assessment as a line item on the sales invoice.