(a) Evidence of stated price or ownership of merchandise may include, but is not limited to:
(1) The actual merchandise alleged to have been shoplifted; or
(2) The unaltered content of the price tag or marking from such merchandise; or
(3) Properly identified photographs of such merchandise.
(b) Any merchant may testify at a trial as to the stated price or ownership of merchandise, as well as to other matters pertaining to the case.