I have applied to Purdue University- West Lafayette for a computer science major with Spring 2017 entry term. My application was complete with all the documents sent on September 14, 2016. I still haven't heard from them. Simultaneously, I have got into TOSU- Columbus and have paid the acceptance fee. But, I'm yet to pay the courier charges for receiving my I-20. Should I pay them or wait for Purdue. I need to complete my visa formalities before October 15, 2016. What should I do? Purdue is my dream school.