[narrator]

40 watts while idle = 28.8 kwh a month so 13.5 cents per kwh = $3.88 / month to run. Rasberry Pi B+ uses 1.21 watts while idle so about 11 cents /month. So a Rasberry Pi will pay for itself in about 10 months.

[mark-r]

Given that the Raspberry Pi costs half as much to start, even adding a case, you're ahead on day 1.

[narrator]

Throw in a used 19" LCD that uses 32w (<$30 on ebay) and you're still ahead.

[vacri]

... assuming the target audience of schools, non-profits, and call-centers leave them on 24/7.