| From the introduction, no two pieces of equipment Jimmy bought with his
initial 6,000 Cosmic Credits cost him the same amount of money. By clue 8,
Jimmy paid twice as much for the ATT transponder as he did for the item made
on Delpi, which cost 200 more credits than the Tau-manufactured article
(clue 4); while by clue 5, Jimmy paid twice as much for the piece of gear
made on Xenobus as he paid for the stun shield, which cost him 200 more
credits than the Airth-made item (3). Between the four clues, then, either
all six pieces of equipment are named or there is some commonality. If all
six items were listed, then either the Tau-made (8, 4) or the Airth-made
(5, 3) item would have cost Jimmy the least, 200 credits (6). If the piece of gear
manufactured on Tau had cost the 200 credits, by clues 4 and 8, the item
from Delpi would have cost 400 and the ATT transponder 800. Then the three
articles in clues 3 and 5 would have cost 6000-1400, or 4600 credits.
Adding the amounts in the two clues with the Airth-made one costing X,
the stun shield would have cost X+200 and the Xenobus-manufactured
item 2X+400, a total of 4X+600. So, solving, 4X+600 = 4600,
or X would equal 1000. But the gear from Xenobus then would
have cost Jimmy 2400 credits, contradicting clue 9. If the gear made on
Airth had cost the 200 credits, then the Tau-made equipment would have had
to cost more than 200 and the ATT transponder would have cost the most--no
(1). Therefore, there must be some overlap between the two sets of gear in
clues 8, 4 and 5, 3. Xenobus didn't make the ATT transponder and Delpi
didn't produce the stun shield, since then the Tau- and Airth-made articles
would have cost the same sum, contrary to the introduction. If Tau were
the origin of the stun shield, then combining the four clues, given that
the ATT transponder didn't cost the most (1) and that the Airth-made item
therefore cost the least, 200, the Tau-made gear would have cost 400, that
from Delpi 600, the Xenobus-built item 800, and the ATT transponder 1200
credits, a total of 3200. But the sixth would have cost 2800 credits,
contradicting clue 9. So, the item Jimmy bought from Airth must be the
ATT transponder. If the Tau-made gear didn't cost the low of 200 credits,
then the five pieces of gear among the four clues would have cost 5800
credits as follows: the Tau-made one X, the item from Delpi
X+200, the ATT transponder from Airth 2X+400, the stun shield
2X+600, and the gear built on Xenobus 4X+1200. Solving,
10X+2400 = 5800, or X = 340. But the Xenobus-made item then
would have cost 2560 credits--no (9). So, combining the clues, Jimmy paid
200 credits for the item made on Tau, 400 for the Delpi-produced article,
800 for the the ATT transponder from Airth, 1000 for the stun shield, and
2000 for the gear constructed on Xenobus, a total of 4400, with the sixth
then costing 1600. By clue 2, the stun shield was made on Phaetonia, and the
gravity boots were a Delpi product. By elimination, the sixth item that
cost 1600 credits was manufactured on Landesberg. By clue 10, Tau made the
light glasses. The planet Xenobus built the X-Sled and Landesberg the particle
rifle (7). In sum, Jimmy's six purchases of equipment at the start of play in
Cosmic Armageddon were as follows:
- 2000 for the Xenobus-made X-Sled
- 1600 for the Landesberg-made particle rifle
- 1000 for the Phaetonia-made stun shield
- 800 for the Airth-made ATT transponder
- 400 for the Delpi-made gravity boots
- 200 for the Tau-made light glasses
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