If Matthews has 60 cows, Aaron has 4*60 = 240 cows.
Together, Aaron and Matthews have 240+60 = <<240+60=300>>300 cows.
Since Marovich has 30 fewer cows than the combined number of cows that Aaron and Matthews have, Marovich has 300-30 = <<300-30=270>>270 cows.
Altogether, the three have 270+300 = <<270+300=570>>570 cows
#### 570