medium · GMAT Quant
A facility manager is choosing between two monthly electrical service structures. Plan Alpha imposes a charge of $0.12 per kilowatt-hour for the first 400 kilowatt-hours used in a month, and $0.18 per kilowatt-hour for any usage exceeding 400 kilowatt-hours. Plan Beta imposes a fixed monthly delivery fee of $30, plus $0.10 per kilowatt-hour for all kilowatt-hours used. A daytime solar credit of $0.05 per kilowatt-hour is offered under Plan Beta for facilities with solar panels, but this facility has none.
What is the absolute difference, in dollars, between the monthly bills under Plan Alpha and Plan Beta for a facility consuming 650 kilowatt-hours in a month?
- $2
- $30.50
- $24
- $93
- $17
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