Question 4 • FowU - Financial Math - B
Friday has the most favorable rate, ¥92.7120 per dollar, and Wednesday has the least favorable rate, ¥87.5507 per dollar. The difference is 92.7120 − 87.5507 = ¥5.1613 per dollar. After the 6% surcharge, Mary exchanges 94% of $311.75, so the difference is about 5.1613 × 311.75 × 0.94 = ¥1,512.49, or about ¥1,513. The correct choice is ¥1,513.
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