Trump's FEC filing for July shows net operating expenses of
$68,613,970. He has not released the itemized detail of his expenses yet (generally released at the end of the quarter).
http://www.fec.gov/fecviewer/CandidateCommitteeDetail.do?candidateCommitteeId=P80001571&tabIndex=3Month over month, comparing to June, it appears the big difference is probably he paid himself back the fifty million or so he loaned his campaign. He promised to 'forgive' that loan, and the outstanding loans did go to $0, however, the expenses shot up by more than the amount he loaned himself from his campaign.
It appears as though, instead of buying any ads, he paid himself back for his primary loans from the $80 million he raised.
We'll know more at the end of the quarter. Of course, by then, no one will care.