A toy shop sells 4 types of dolls (doll A,B,C,D). If:
I) doll B cost 10% less than doll A
II) doll C cost 17% less than doll B
III) doll D cost 18% less than doll C
what percent of doll A 's cost is doll D?	Select:
A) 25%  B) 75.2%  C) 60.2%  D) 67.2%  E) 50.5%
Let the cost of doll A be $100   I) doll B cost 10% less than doll A--100-10= 
<gadget id="calculator">--100-10</gadget>
<output>90</output>
90   II) doll C cost 17% less than doll B--90-15.3= 
<gadget id="calculator">--90-15.3</gadget>
<output>74.7</output>
74.7   III) brand 67.2% cost 10% less than brand C --74.7-7.47= 
<gadget id="calculator"> --74.7-7.47</gadget>
<output>67.23</output>
67.23   what percent of brand B's cost is brand 67.2%=67.23*100/100   Answer is 67.2%
<result>D</result>
A toy shop sells 4 types of dolls (doll A,B,C,D). If:
I) doll B cost 10% less than doll A
II) doll C cost 17% less than doll B
III) doll D cost 18% less than doll C
what percent of doll A 's cost is doll D?