Ariz. Rev. Stat. § 41-1604.02
The department may establish and maintain an inmate store at any prison, institution or facility. The department shall enter into a contract or contracts with a private entity or entities to establish and maintain inmate stores. The department or Arizona correctional industries may also be considered as an entity eligible for award. Such inmate stores shall offer for sale, at prices that are fixed by the contractor with direction from the director and that are no higher than prices of similar retail products, toilet articles, candy, tobacco products, notions and other sundries to the persons confined. The department may provide the facilities necessary to operate such inmate stores. All profit derived from the state's portion of privatization of such inmate stores shall be deposited in an inmate store proceeds fund. The director shall transfer five hundred thousand dollars from the inmate store proceeds fund annually to the department of corrections building renewal fund established by section 41-797. Any remaining monies in the fund may be used at the director's discretion for inmate activities, incentive pay increases for corrections officers, equipment to enhance safety for both department personnel and inmates or other official needs as required.
A.R.S. § 41-1604.02