R.I. Gen. Laws § 13-7-10: Price of goods.

The price of all articles and materials supplied by the public welfare institutions shall conform as nearly as practicable to the wholesale market rates for similar goods manufactured elsewhere. Any difference of opinion in regard to price shall be submitted for arbitration to a representative of the department of corrections, a representative of the requisitioner, and the director of administration, and the decision of a majority of them shall be final.