How much did mariner 4 cost?

Mariner 4, the first spacecraft to successfully fly by Mars, had a total mission cost of approximately $80 million, which included both the spacecraft development and mission operations. Launched on November 28, 1964, it provided groundbreaking images of the Martian surface, marking a significant milestone in space exploration. The mission was part of NASA's Mariner program, which aimed to explore the planets in our solar system.