As used in this chapter the following words shall have the following meanings:

(1) "Vocational education" shall have the same meaning as set forth in RCW 72.62.020.

(2) "Students" means inmates of adult correctional institutions or facilities enrolled in a vocational education program.

(3) "Products" means goods, wares, articles, or merchandise produced by students as part of a vocational education program.

(4) "Services" means work performed for others by students as part of a vocational education program not related to the production of products.

Superintendents and administrators of adult correctional institutions and facilities, or their designees, may adopt procedures for the sale of products and services on the open market. The prices for products sold on the open market may be established at levels sufficient to recover the cost of production, including the cost of materials used and the value of depreciation of equipment used to produce the products. The prices for services sold on the open market may be established at levels sufficient to recover the cost of performing the service.

The proceeds from the sale of products shall be credited to the institution or facility where the products were produced, deposited in a revolving fund, and expended for the purchase of supplies, materials, and equipment for use in vocational education programs. The proceeds from the sale of services shall be credited to the institution or facility where the services were performed, and may be expended for the purchase of supplies, materials, and equipment for use in vocational education programs, and for the payment of wages earned by students in performing services.