Sandy buys an old scooter for $900 and spends $300 on its repairs. If Sandy sells the scooter for $1260, what is the gain percent?	Select the correct option:
A) 3%
B) 5%
C) 7%
D) 9%
E) 11%
selling price / total cost = 1260/1200= 
<gadget id="calculator">1260/1200</gadget>
<output>21/20 = around 1.05</output>
1.05   The gain percent is 5%.   The answer is 5%.
<result>B</result>
Sandy buys an old scooter for $900 and spends $300 on its repairs. If Sandy sells the scooter for $1260, what is the gain percent?