A summary of the status of the Company's outstanding warrants for common stock as of January 31, 2015 and April 30, 2014 and changes during the periods is presented below:

On January 21, 2014, the Company began the implementation of its “Warrant Conversion Program.” The program consists of having every warrant holder of a Class A warrant convert his or her Class A warrants (with an exercise price of $0.075 per share) into shares of common stock and receive an equal number of new Class D warrants (with an exercise price of $0.25 per share). As of October 31, 2014, 18,755,200 Class A warrants and 2,318,000 Class B warrants were exercised for total cash proceeds of $1,658,880. On September 1, 2014, the Company granted 854,308 warrants to purchase common stock as part of the Warrant Conversion Program. This resulted in an expense of $100,000 under a consulting services agreement to facilitate the Warrant Conversion Program. This expense was included in general and administrative expense.