Question 177 • Financial Math - MA2007
The first 400 kWh cost 400 × $0.085 = $34, and the next 400 kWh cost 400 × $0.12 = $48. The remaining 1,465 − 800 = 665 kWh cost 665 × $0.145 = $96.425. The total is $34 + $48 + $96.425 = $178.425, which rounds to $178, choice c.
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