Complex sentence: On 18 April 1968, Rennie's bridge was purchased by the Missourian entrepreneur Robert P. McCulloch of McCulloch Oil for US $2,460,000.
Split into simpler sentences: On 18 April 1968, Rennie's bridge was sold to an American. It was purchased by the Missourian entrepreneur Robert P. McCulloch of McCulloch Oil for US $2,460,000.