The composition of fumace oil is given below. Calculate the additional oxygen required for the combustion of the fumace oil.

$\backslash$table$[[$Constitugents$,$S By weight$],[$Carben$,80],[$Hydogen$,15],[$Oxygen$,1\mathrm{.}6],[$Nitrogen$,0\mathrm{.}5],[$Sulphur$,0\mathrm{.}5],[$Water$,0\mathrm{.}35],[$Ash$,0\mathrm{.}05]]$