Why would you assume drilling was done on Nov28?

Because of this phrase in the document?: 

In addition, as described in this MD&A, the Company also had certain financial commitments to incur expenditures on two 50%

owned mineral concessions in the amounts of approximately $372,000 by November 17, 2012 and $326,000 by May 2, 2013. The

spending commitments on both of these two concessions were completed on November 28, 2012.

How do you know that this is in fact with Cascadero, maybe Lumina has commitments with another partner?  How do you know that the expenditures had something to do with drilling?

Can you please clarify?