Complex sentence: Total production by Canadair for Canadian Forces was 89 single-seat aircraft and 46 dual-seat aircraft, but many were also built for the Netherlands and Norway as well, some surplus aircraft were sold to Venezuela.
Split into simpler sentences: Total production by Canadair for Canadian Forces was 89 single-seat aircraft and 46 dual-seat aircraft. Many were also built for the Netherlands and Norway as well, and some surplus aircraft were sold to Venezuela.