Bunuel
Suppose that, at current exchange rates, $1 (US) is equivalent to Q euros, and 1 euro is equivalent to 7Q Chinese Yuan. Suppose that K kilograms of Chinese steel, worth F Chinese Yuan per kilogram, sold to a German company that paid in euros, can be fashioned into N metal frames for chairs. These then are sold to an American company, where plastic seats & backs will be affixed to these frames. If the German company made a total net profit of P euros on this entire transaction, how much did the US company pay in dollars for each frame?
(A) \(\frac{KF}{7NQ^2} + \frac{P}{NQ}\)
(B) \(\frac{KF}{7NQ} - \frac{P}{N}\)
(C) \(\frac{KF}{7NQ} + \frac{PQ}{N}\)
(D) \(7QKF - \frac{P}{N}\)
(E) \(7Q^2KF + \frac{PQ}{N}\)
Breaking Down the Info:The strategy is to put everything in dollars since that is our final answer's currency.
$1 USD is equivalent to Q euros, which is equivalent to \(7Q^2\) yuan. Then K kilograms of Chinese steel is worth KF yuan, which is worth $\(\frac{KF}{7Q^2}\). Profit = Revenue - Cost, the revenue of the German company was how much the US company paid. The profit for the German company is P euros = $\(\frac{P}{Q}\).
Then Revenue = Profit + Cost = $\(\frac{P}{Q} + \frac{KF}{7Q^2}\). Finally divide by N to get the per frame cost.
Answer: A