1. The problem involves calculating the total energy supplied over a 12-hour period, given an energy value of 436800 J. 2. Since the energy supplied is given as 436800 J, and the time period is 12 hours, the total energy supplied during this period is simply the given energy value multiplied by the number of times energy is supplied if applicable. 3. The problem mentions selectable buttons for entering the number of times energy is supplied: Once, Twice (selected), Three times, Four times. 4. Since "Twice" is selected, the total energy supplied is: $$\text{Total Energy} = 436800 \times 2 = 873600$$ 5. Therefore, the total energy supplied during the 12-hour period is 873600 J. 6. The angles 18° and 22° are given but not directly relevant to the calculation of total energy supplied in this context. Final answer: $$873600$$ J