Final answer:
Ariel gained c$10,973.6 in the transaction.
Step-by-step explanation:
The amount of money Ariel purchased from the bank in America is $11,000. The bank charged Ariel a commission of 0.6% on this amount, which is equal to 0.006 * $11,000 = $66.
Now, Ariel sells the US dollars to a bank in Canada. Using the given exchange rate of c$1 = us$0.8915, we can calculate the amount of money in Canadian dollars that Ariel receives: $11,000 * c$1 = c$11,000.
The bank in Canada charges Ariel a commission of 0.24% on this amount, which is equal to 0.0024 * c$11,000 = c$26.4.
To determine how much money Ariel gained or lost in the transaction, we need to subtract the total commission charges from the amount of money in Canadian dollars Ariel received: c$11,000 - c$26.4 = c$10,973.6.
Therefore, Ariel gained c$10,973.6 in the transaction.