If Coco used his oven 25 hours last month and its energy consumption is 2.4 kW per hour, then we consumed a total of 25*2.4= <<25*2.4=60>>60 kW on his oven last month
If the price of electricity is $0.10 per kW, then 60 kW would cost = $0.10*60 = $<<0.10*60=6>>6
#### 6