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Math Problem (related to Credit Card bill) **10 pts**?
Now, my Canadian credit card service charges 50 cents per transaction, +3% for international sales, in Canadian currency. Assuming that is all there, please consider the following problem.
A science supplies company, based out of the USA (int'l), charged me $18.70 USD, while it showed up as $20.02 CAD on my credit card bill. I already find myself unable to make sense of this seemingly incongruous result.
Another company, based out of the UK (int'l), charged me an unknown amount (CAD), and it showed up as $5.28 CAD on my bill. What was the original amount?
Their currency conversions might not be up-to-date, and there are multiple ways one can look at this problem.
$18.70 USD = $18.97 CAD
+ 0.50 x 1.03 or x 1.03 + 0.50
Either way, it doesn't make much sense.
2 Answers
- rtfmLv 78 years ago
This is a very badly written problem. For one thing, why would a company based in the UK charge you in CAD?
But assuming the facts are as you have stated them ... they charged you the original price (call it x), plus 3 percent of x, plus 50 cents.
So 100 percent of x plus 3 percent of x plus 0.5 = 5.28.
Turn that into an equation: 1.03x + 0.5 = 5.28
You can take it from there.
The $18.70 problem doesn't make sense, given the rules you've stated here. It should be (18.70 x 1.03) plus 0.50, which would be $19.76.
