Retired Engineer Builds Necktie-Tying Robot: A Mechanical Marvel

The transcript describes a 65-year-old engineer, Goldstein, who spent six years creating a necktie tying robot with 350 movements. Inspired by a childhood visit to a chocolate wrapping machine, Goldstein pursued mechanical engineering. Despite the robot's complexity, it is impractical, taking nine minutes to tie a tie and costing $250,000. Ironically, Goldstein dislikes ties. The robot will be displayed at the Franklin Institute.

What is the estimated cost of the necktie tying robot?

What is the final irony mentioned about the inventor?