A pawnbroker shall not sell any pledge where the loan is seven dollars ($7) or more unless due notice of such contemplated sale has been forwarded to the pledger by mail to the address given by the pledger at the time of obtaining the loan or to such new address of the pledger, as shown on the pawnbroker's record. Notice of the contemplated sale of a pledge shall be mailed to the pledger not less than thirty (30) days prior to the date of sale. Such notice shall state total amount of principal, interest, and charges due on the loan as of the date of the notice.