Answer:
Step-by-step explanation:
usually electricity is sold in the units of kWh, which I will ASSUME is the case here.
85 W (1 kW/1000W)(1hr)(10 p) = 0.85p
60 W (1 kW/1000W)(1hr)(10 p) = 0.60p
together they would cost 1.45 p
which would be rounded down to 1 p