“Dealer agreement” means an oral or written agreement between a supplier and a dealer by which:
1. A commercial relationship of definite duration or continuing indefinite duration is established;
2. The dealer is granted the right to offer and sell inventory at retail;
3. The dealer constitutes a component of a system for the distribution of inventory; and
4. The operation of a portion of the dealer’s business is substantially dependent upon the supplier for a continued supply of inventory.