(b) The payment under item (a)(1) is due in 12 equal, monthly installments, beginning 30 days after the franchise is terminated or nonrenewed. The payments under items (a)(2) through (a)(5) are due no later than 90 days after the franchise is terminated or nonrenewed. As a condition of payment under items (a)(2) through (a)(5) the motor vehicle dealer must comply with all reasonable requirements provided by the manufacturer, distributor, or wholesaler regarding the return of inventory. If a manufacturer, distributor, or wholesaler does not reimburse the motor vehicle dealer for the amounts required under items (a)(2) through (a)(6) by the deadlines under this subsection (b), then the manufacturer, distributor, or wholesaler shall, in addition to any amounts due, pay the motor vehicle dealer:
(1) interest on the amount due at a rate reasonable in light of commercial practices, determined by the Board or arbitrator; and (2) reasonable attorney's fees and costs.