About 30 years ago my uncle bought a calculator for about $200. it could so simple mathematical calculations and had a limited memory. today. similar calculator costs under $5.why

I am going to say because the amount it costed to manufacture the calculator back then was so much more than it costs to manufacture one today. But if you are wondering why it cost so much to buy a graphing calculator that because they are rechargeable, they have much more memory and data space, even today graphic calculators can range from anywhere between $150 and $200 dollars, if you buy a nice one

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I hope this answers your question