[Dogsi]

LOL... sorry for laughing at the OP, but your math is completely wrong.

Think of it like this. You are on 200 supply. That OL gave you nothing. You sacrificed it. You lost a unit that cost you 100 minerals. You lost nothing else. You don't need to spend anything.

Now, lets say you had 150 supply, all of it is used. You sacrifice an OL and need to build another one to replace the one you lost. It's not 200 minerals as you still have the OL, which you would have needed to build anyways if you hadn't spent that 100 minerals on the first OL. So again, you really only spent 100 minerals on the scout.

You can't double count the unit.

A comparable error in logic would be if you scouted with a zergling. That zergling cost you 25 minerals. What you would be doing is saying that it cost me 50 minerals because I had to spend 25 minerals to replace the lost one.

If you still don't see the distinction, think of it like this. I have a templar. It dies. I warp in another one. Applying the same logic as before, the previous high templar cost me 100/300 (templars are 50/150 right?).

Now, lets continue that logic a few times. Warp in templar, it dies, warp in templar, it dies, warp in templar, it dies, warp in templar, it dies. Now, since each templar is replacing a previous templar, using your previous logic, that templar cost me 200 minerals and 600 gas.