Dr. Jones pays $6000 / 4 =$ <<6000/4=1500>>1500 for his electric and water bill.
He pays $6000 / 5 = $<<6000/5=1200>>1200 for his insurances.
The total amount he pays for the bills and insurances is $1500 + $1200 = $<<1500+1200=2700>>2700.
The remaining money from his earning after paying off the bills and insurance is $6000 - $2700 = $<<6000-2700=3300>>3300.
The total amount he needs to pay for the rent and food expenses is $640 + $380 = $<<640+380=1020>>1020.
So, Dr. Jones has $3300 - $1020 = $<<3300-1020=2280>>2280 left
#### 2280