Mechanical reapers didn't exist in the 1800's and weren't made until the early 1900's. So they didn't cost anything.
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Cyrus McCormick.
It was invented in Middle Ages. Around 1300 AD.
John Logie Baird was a Scottish engineer, innovator and inventor. He invented the world's first mechanical television, the first color television system the first color television picture tube.
the Z1 was created by Conrad Zuse in 1936, its considered to be the first electro mechanical binary programmable computer
John Mauchly, a mechanical engineer, co-invented with John Presper Eckert, the first general-purpose electronic digital computer, called the ENIAC. Later, the duo invented the first digital electronic computer available for sale to the general public, called the UNIVAC.