(a) Acceptance of goods occurs after the lessee has had a reasonable opportunity to inspect the goods and:
(1) the lessee signifies or acts with respect to the goods in a manner that signifies to the lessor or the supplier that the goods are conforming or that the lessee will take or retain them in spite of their nonconformity; or
(2) the lessee fails to make an effective rejection of the goods (G.S. 25-2A-509(b)).
(b) Acceptance of a part of any commercial unit is acceptance of that entire unit.