In a day, Mr. Jesiah's total income from the sale of the milk is $3.55/gallon * 200 gallons/day = $<<3.55*200=710>>710/day
In June, his total income is $710/day * 30 days = $<<710*30=21300>>21300
The net income from the sale is $21300 - $3000 = $<<21300-3000=18300>>18300
#### 18300