A Diesel bunker oil (SG = 0.80) with a total capacity of 180,000 gallons supplies heating energy for three boilers with different steaming capacity. Boiler A produces 108 kg per minute of steam at 1.18 FE and 80% boiler efficiency. Boiler B produces 88 kg per minute of steam at 7.8 mpa and 560 degrees Celsius with a feedwater temperature of 98 degrees Celsius and boiler efficiency of 88%. Boiler C produces 78 kg per minute at wet steam of 2.2 mpa and 0.84 quality and feedwater temperature of 98 degrees Celsius and boiler efficiency of 88.8%. Calculate the number of days the Diesel stock would last for a 24-hour operation daily if the fuel used under the American Petroleum Institute has 28 degrees rating