A municipal body conducted an energy study survey for the waste collected across the town to efficiently utilize the energy content of the waste produced. The study revealed following the information.

Component	% by mass	Energy (kJ/kg)
Food waste	15	4500
Paper	25	16500
Pasties	15	30200
Wood	20	18500
others	25	1000

The energy content (in kJ/kg) on an ash free dray basis, assuming the moisture content and ash content of the waste to be 20% and 5% respectively.