How muh money is saved by replacing humans with robots?

Answer 1

A lot (If the robot can work for long time). But its not quite a good idea as many humans will lost their jobs.

Another answer:that depends on the application and the robot used.

Often a robot is little more than an automated arm that pushes a package off a conveyor belt.

In other circumstances, a robot can be an automated welding machine that sticks two pieces of metal together being both precise and repeatable.

The "one size fits all, do everything you can think of" robot has not yet been invented.

Often the most simple robot can save the most money; the automated arm that pushes packages off a conveyor belt can save thousands of dollars per month, just by being accurate.

The robotic vehicles that are collecting data on Mars are not very cheap. Engineers have designed a great amount of functionality into those robots making them both reliable and high functioning. But those robots are not "saving" money as much as they are protecting people from the risks of space travel.