During each marketing season and not later than July 1st, the commissioner shall estimate a budget necessary for the administration and enforcement of this order and for carrying on duly authorized programs and activities including advertising, promotion and publicity, marketing and product research and informational services as hereinbefore provided. The commissioner shall announce rates of assessment to provide adequate funds to defray expenditures in the budget. The rate of assessment shall not exceed: eight cents per hundred pounds of apples delivered to juice or cider processing plants for processing into juice or cider or products thereof; eight cents per hundred pounds of apples purchased or accepted for all other processing; and sixteen cents per bushel or bushel weight equivalent of apples sold for fresh market use; provided, however, the maximum assessment for fresh apples sold for direct market sale shall be eight cents per bushel. It is further provided that none of the foregoing rates of assessment shall exceed the maximum rate authorized in paragraph 2(d) of section 294 of the act. The total amount of budgeted administrative cost shall not exceed five percent of the total budget.