On a purchase of $127, a store offered a payment plan consisting of a $27 down payment and 12 monthly payments of $10 each. What percent of the purchase price, to the nearest tenth of a percent, did the customer pay in interest by using this plan?	Choose the correct choice from the following answers:
A) 18.3% B) 15.3% C) 21.3% D) 22.3% E) 25.3%
12*10 + 27= 
<gadget id="calculator">12*10 + 27</gadget>
<output>147</output>
147   (27/127)* 100= 21.3   Answer : 21.3%
<result>C</result>
On a purchase of $127, a store offered a payment plan consisting of a $27 down payment and 12 monthly payments of $10 each. What percent of the purchase price, to the nearest tenth of a percent, did the customer pay in interest by using this plan?