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Hi Jack, If you have a selling price of $\$P$ and your profit is 35% of $\$P$ then your cast is 65% of $\$P.$ Thus \[0.65 \times \$P = \$10.00\] Dividing both sides by $0.65$ gives \[\$P = \frac{\$10.00}{0.65} = \$15.38\] Penny | ||||||||||||
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