First find the total income from the federal returns: $50/return * 60 returns = $<<50*60=3000>>3000
Then find the total income from the state returns: $30/return * 20 returns = $<<30*20=600>>600
Then find the total income from the quarterly returns: $80/return * 10 returns = $<<80*10=800>>800
Then add the income from each source to find their total income: $3000 + $600 + $800 = $<<3000+600+800=4400>>4400
#### 4400