(a) The product of all labor of the prisoners confined in the house of correction shall be applied, under the direction of the county courts, to the payment of the expenses of the persons so confined and such other expenses as may be necessarily incurred in improving and keeping the house and farm in repair.
(b) If the product of labor of persons confined in the house of correction shall not be sufficient to defray the expenses indicated in subsection (a) of this section, then the deficit shall be supplied out of the county treasury in such manner as prisoners in the county jail are now supplied.
(c) If the products of the labor of persons confined in the house of correction shall be more than sufficient to defray the expenses indicated in subsection (a) of this section, then the surplus of such products shall be disposed of under the direction of the county court, and the proceeds thereof shall be paid into the county treasury.