An overhead 25-m-long, uninsulated industrial steam pipe of 100-mm diameter is routed through a building whose walls and air are at 25°C. Pressurized steam maintains a pipe surface temperature of

210°C, and the coefficient associated with natural convection is h = 10 W/m2 · K.The surface emissivity is ɛ = 0.8. If the steam is generated in a gas-fired boiler operating at an efficiency of nf = 0.90and natural gas is priced at Cg = $0.02 per MJ, what is the annual cost of heat loss from the line?