it depends on the keywords, the more targeted keywords you rank for the higher is the CTR, there is no exact science that will tell you how many visits for how much money, but if you think with adsense you can do a rough calc, considering a 30%CTR of a bunch of long tail keywords multiplied for the PPC cost of the keywords.
0.6USD for 60clicks? what are you using? are you sure? what is ppc? 0,01?...