A local electricity company charges $1.00 per kWh for the first 2000 kWh and $3.50 for every kWh afterwards. A fuel adjustment charge of
$0.50 per kWh is added to all electricity bills. If Mrs. Browns previous
monthly meter reading was 17 800 kWh and the current monthly meter
reading is 20 300 kWh, calculate the electricity bill for Mrs Brown for
the current month
