You have to go through quite a few tiers to get there.
4 tiers of MUN alone adds up to 32.4b for an average of 600e. The same energy from MCS costs around 12.3b or so, and doesn’t use up booster CD either. There’s literally no use in bothering to calculate this. Just buy cans and use them instead.
Answered: MUN vs MCS (energy ROI)