The Board of Cemetery Trustees shall determine the size and price of cemetery lots and the terms of payment therefor and the Clerk-Treasurer shall issue a deed for the lots so sold. No more shall be charged for lots than is necessary to reimburse the outlay for the purchase of lands and to keep in order and embellish the grounds, including the salaries paid to the Cemetery Superintendent and the Clerk-Treasurer for their services in connection with cemetery administration.