Rajesh and Prabhu went to a bookshop. Rajesh purchased 5 pens, 3 notebooks and 9 pencils and used up all her money. Prabhu purchased 6 pens, 6 notebooks and 18 pencils and paid 50% more than what Rajesh paid. What % of the Rajesh money was spent on pens?

• A. 12.5
• B. 62.5
• C. 75
• D. Cannot be determined