Tariq makes 4 perfect thermobaric warheads in some 40 minutes. Sean is absolutely amazed and since this is so many so fast asks Tariw to make some more rocket tails too (one we have from the unspent training round).

Spending $80 of assorted parts and chemicals (related) for a total effective cost of $160, which is x4 of the final price tag of $40 (10% of $400 the training round costs). Using no extra time.

(3d6)[14] on Engineer (Small Arms) 17 (12 skill, +1 attentive, +1 for $400 invention, +1 for TL7, +2 for extra parts) taking (1d6)[6] x10 min