Keaton can harvest his oranges every year is 12/2=<<12/2=6>>6 times.
So the total money he earns for his oranges every year is $50 x 6 = <<50*6=300>>300.
He can harvest his apples 12/3= <<12/3=4>>4 times in a year.
So the total money he earns for the apple in a year is $30 x 4 = <<30*4=120>>120.
Therefore, the total money he earns for his oranges and apples is $300 + $120 = $<<300+120=420>>420.
#### 420