multifunctional vs water heater

Help me understand. How can a water heater (basically a big cable that acts as a resistor and some plastic) can value the same as a multi functional with a printer and a scanner, which includes a chip, memory, ink cartridges, cd, instructions manual, software, drivers and so on. What is the economical explanation? I guess both are produced in huge quantities. So how come? The concept of “production cost” has no value anymore or HP (the multifunctional) is using free labor of some sort.


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