Retailers who do warranty repair work for a consumer under the provisions of a manufacturer’s express warranty shall be reimbursed by the manufacturer for warranty work at an hourly rate that is the same as or greater than the hourly labor rate that the retailer charges consumers for non-warranty repair work.
     The provisions of this Section shall not apply to a supplier or dealer where a written dealer agreement provides for compensation to a dealer for warranty labor costs either as part of the pricing of the equipment to the dealer or in the form of a lump sum payment, provided the payment is not less than 5% of the suggested retail price of the equipment.