Suppose that a copy takes 1 second to complete and the computer's power supply unit draws 400 W of power during that 1 second. How much does it cost to complete that copy? Hawaii has the most expensive electricity¹ in the United States, averaging at 29.23 cents / kW * h. Let's use 30 cents / kW * h.

If we have 400 W sustained for one second, that equals 0.000111111111 kW * h. (400 Watt * second) * (30 cents / kWh) = 3.33333333 × 10^-5 U.S. dollars. In Hawaii, that one copy would cost $0.0000333333. If one were to make 100 000 copies of that same data, it would cost $3.33333333.

¹ https://www.electricchoice.com/electricity-prices-by-state/