I normally explain this concept to people like hon Smit that, lowest cost doesn't mean cheapest. Okay? It means the net impact of the cost overall, including opportunity cost and other things. For an example, when you burn diesel in pick hours, it is very expensive, but in terms of availability, it is the lowest cost option at your disposal.
So, I understand that concept in broad terms than narrowly cheap as in rands and cents. I look into opportunity cost. That's why for an example when I argue with many people who are very fundamental in discussing this issue, I normally tell them that, if you look into
nuclear power from Koeberg today, it is at 40c per unit to Eskom. It is the lowest, most reliable and most efficient.
But, if you want to assess the cost, you must build in the commissioning cost which is higher, and the decommissioning cost which is also higher. So, the cost should be covering all aspects of the life of a facility. That is why that Question was posed. We have energy mix in the IRP so that we can have options in dealing with this matter.