Being the cost of the steam $ 83.00/Ton of steam and consumes 70Kg of gas/Ton of steam, operating 8000 hours per year. In a pipe line it was found  a leak that had 5mm of diameter in which flues steam at 10 Atm (10.00 kgf/cm2).
It is observed a lost of 87 Kg/Hr. = 0.087 Ton/Hr. x 8000 Hrs/year
= 696.00 Ton-steam /year
= 696.00 Ton-steam/year x 0.070 Ton-gas/Ton steam
= 48.72 Ton-gas/year.
= 696.00 Ton-steam/year x $ 83.00 /Ton-steam
= $ 57,768.00 per year