You may need a calculator to fill in the blanks.
Remember that a "unit" is also called a "kiloWatt-hour".
You will need these numbers: 61.66, 886 (twice), 53.16 If you get really stuck, try the "Hint" button.

Present meter reading: 60603 units
Previous meter reading: 59717 units
Units used: (HINT - subtract the meter readings. Also type this number into the next box.)

Electricity cost: units at 6p per unit: £(HINT - remember that 6p is £0.06, then multiply the numbers together)
Standing Quarterly charge: £8.50
Total bill: £
(HINT - add the electricity cost to the quarterly charge)