An investor bought two shares of stock, which he sold for $84 each. If he had a profit of 20% on one of the shares and a loss of 20% on the other share, then on the sale of both shares combined, the investor had:
Choose the most appropriate option:
A) a profit of $10
B) a profit of $7
C) a loss of $7
D) a loss of $10
E) neither a profit nor a loss
The cost of the first stock was 84/1.2= 
<gadget id="calculator">84/1.2</gadget>
<output>70</output>
70, so the profit from it is 14.   The cost of the second stock was 84/0.8= 
<gadget id="calculator">84/0.8</gadget>
<output>105</output>
105, so loss from it is 21.   Overall the loss is $7.   The answer is a loss of $7.
<result>C</result>
An investor bought two shares of stock, which he sold for $84 each. If he had a profit of 20% on one of the shares and a loss of 20% on the other share, then on the sale of both shares combined, the investor had: