March 31, 2013

December 31, 2012

Number of

Weighted Average

Number of

Weighted Average

Warrants

Exercise Price

Warrants

Exercise Price

Outstanding, beginning of year

16,365,209

$                   0.17

20,413,430

$                 0.19

Issued

50,000

0.12

1,425,112

0.12

Exercised

35,000

 0.10

(583,333)

0.15

Expired

(1,100,000)

 0.25

(4,890,000)

0.23

Outstanding, end of period

15,280,209

$                   0.17

16,365,209

$                 0.17