(a) On prevailing in an action commenced by the department through the attorney general under this chapter, the department and the attorney general are each entitled to recover:
(1) investigation costs and fees;
(2) reasonable attorney's fees;
(3) court costs; and
(4) other costs relating to the action, including the cost of depositions and other forms of discovery and copying charges.
(b) The costs recoverable under this section are in addition to other relief available to the department or attorney general.