Complex sentence: Under his influence, the State of California purchased for $660,000 on a matching grant basis and the property upon which the Oakland Zoo had been relocated to, became a State Park on 30 April, 1948.
Split into simpler sentences: Under his influence, the State of California purchased for $660,000 on a matching grant basis. This property became the new site of the relocated Oakland Zoo and became a State Park on 30 April, 1948.