what where the tournaments in the 2007 tpg tour?
pinamar open, south open, parana open, norpatagonico open, center open, angel cabrera classic, chaco open, north open, metropolitano open, misiones open, carlos franco invitational, salta open, tandil open, argentine masters, mendoza open, roberto de vicenzo classic, san luis open, abierto del litoral, argentine open
which of these tournaments had the highest purse?
argentine open