You're right.
Missile targets:
13 infantry ($19500)
12 mechs ($30000)
4 mechs ($10000)
2 rockets ($30000)
They're all spaced far enough so that none of them overlap. Five trials for each test.
13 infantry vs. 12 mechs
3x infantry
2x mechs
12 mechs vs. 2 rockets
5x mechs
4 mechs vs. 2 rockets
5x mechs
13 infantry vs. 12 mechs vs. 4 mechs vs. 2 rockets
5x infantry
It's not conclusive, so it'll need much more testing.

