Question
Suppose that a bookstore buys a textbook from the publisher for $\$ 80$. At what price should the bookstore mark the textbook so that it may be offered at a discount of $10 \%$ but still give the bookstore a $35 \%$ profit on the $\$ 80$ investment?
Step 1
We do this by multiplying the cost price ($80) by 135% (or 1.35 as a decimal). This is because 35% represents the profit we want and 100% represents the original value. \[80 \times 1.35 = 108\] Show more…
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