Any money realized from the sale of any products of said schools, or the farms connected therewith, or for the maintenance of children from other counties, may be used by said board of managers for such purposes as, in its discretion, it may decide will further the interests of the school. At the end of each calendar year, all such money shall be properly accounted for to the county commissioners or the county controller of such county by the filing of paid vouchers, properly approved, or by depositing in the county treasury in cash such balances as may remain at the end of the said each calendar year.
11 P.S. § 386