Haw. Rev. Stat. § 353-31

Subject to the approval of the department of budget and finance, a special revolving fund for each correctional facility store may be established for the purpose of purchasing items to be resold to inmates. All moneys received from the resale of allowable items in correctional facility stores shall be deposited in the revolving fund for each such store. The proceeds of each fund shall be expended at the discretion of the director, but shall be used only for purchasing items to be resold to inmates and for purchasing of other goods or services for inmate benefits and needs.