triangle arbitrage quick question challenge, positive, question

Howd

thought i had this down…
i am doing challenge problem 12 of ECON p.315 schweser:
EUR/USD: 0.7-0.701
USD/GBP: 1.7-1.701
EUR/GBP: 1.2-1.201
what is the profit on triangle arbitrage on 1 million USD? when i go one way around the triangle, i get the right answer (6372$), but when i go the other way, i get minus 9159$. is that right? should i go both ways and take the positive number as the answer?

dontknow1987

no one said that if you do the traingle the other way around it’s gonna be the same number.
in fact, both of your calculation are good.

Micholien

right, so what is the difference between the 2 numbers i am getting?

Colum

the difference has no meaning. only one way can make money in triangular arb. at the end you should have more than you started with.

krause2

yeah its just about making a profit…if one way makes cash, then thats the answer.

PieMan

yeah, that was a brain fart. gotta stop eating those beans. can’t afford it tomorrow!