Note, different versions of UFO/XCOM seem to have different prices for some items (notably armour!). The profits (or losses) here are for using 1 workshop and as many engineers as appropriate to fill the workshop to build one product for one 31 day month. Costs for the materials and engineers (at $25,000 /mo each!) dominate. Workshop and living space are included in the calculations, however, as are the "cost" of alloys and E-115 (which could be sold instead). Motion scanners are a good deal early on, before you know how to produce much. Laser cannons are a much better deal, but take a while to learn to produce (since you have to work your way through the laser tree). Neither one needs alien alloys or Elerium 115. Item Eng Hrs Cost Space/E-115/ Alloys} Sale price net profit/mo Motion Scanner 220 34,000 4 0 0 45,600 615,338*** Medkit 420 28,000 4 0 0 46,500 318,286 Psi amp 500 160,000 4 1 0 194,700 843,706 Personal Armour 800 22,000 12 0 4 59,000 -598,860 Power suit 1000 42,000 16 5 5 85,000 -1,253,592 Flying suit 1400 58,000 16 16 5 115,000 -1,889,606 Alien alloys 100 3,000 10 0 0 6,500 3,600 Elerium 115 0 0 0 0 0 5,000 NA Laser pistol 300 8,000 2 0 0 20,000 188,880 Laser rifle 400 20,000 3 0 0 36,900 262,998 Heavy laser 700 32,000 4 0 0 61,000 228,651 Plasma pistol 600 56,000 3 0 1 84,000 38,620 Pl pistol clip 60 2,000 4 1 0 4,440 -2,649,424 Pl rifle 820 88,000 4 0 1 126,500 146,371 Pl rifle clip 80 3,000 4 2 0 6,290 -4,059,738 Heavy plasma 1000 122,000 4 0 1 171,600 285,854 Hvy clip 80 6,000 4 3 0 9,590 -6,070,398 Blaster launche 1200 90,000 5 0 1 144,000 161,250 Blaster bomb 220 8,000 3 3 0 17,028 -2,163,622 Small launcher 900 78,000 3 0 1 120,000 164,893 Stun bomb 200 7,000 2 1 0 15,200 -668,208 Alien grenade 200 6,700 2 2 0 14,850 -1,569,936 Mind Probe 1200 262,000 4 1 0 334,000 721,640 Firestorm 14000 400,000 30 0 65 0 -1,408,200 Lightning 18000 600,000 34 0 85 0 -1,195,387 Avenger 34000 900,000 36 0 170 0 -997,038 UFO power sour 1400 130,000 22 16 5 250,000 -624,000 UFO navigation 1600 150,000 18 0 3 80,000 -2,168,160 Fusion ball laun 400 242,000 6 0 0 281,100 2,061,144 Fusion ball 600 28,000 6 4 0 53,300 -849,632 Laser cannon 300 182,000 6 0 0 211,000 2,025,680*** Plasma beam 500 226,000 8 15 0 267,300 -3,194,515 Tank/laser cann 1200 500,000 25 0 0 594,000 797,000 Hovertank/plasm 1200 850,000 30 30 5 980,000 -1,185,000 Hovertank/launc 1400 900,000 30 25 8 1,043,000 -895,371 HWP fusion bomb 400 15,000 25 5 8 31,500 -3,473,250