K A chemical manufacturer wants to lease a fleet of 26 railroad tank cars with a combined carrying capacity of 392 000 gallons Tank cars with three different carrying capacities are available 7 000 gallons 14 000 gallons and 28 000 gallons Letting t number of 28 000 railroad tank cars in the fleet 2t 4 7 000 gallon railroad tank cars and 3t 30 14 000 gallon railroad tank cars will be in the fleet for a certain range of t The cost of leasing a 7 000 gallon tank car is 250 per month a 14 000 gallon tank car is 850 per month and a 28 000 gallon tank car is 1150 per month Which of the solutions to the number of each type of tank car in the fleet would minimize the monthly leasing cost 7 000 gallon tank cars 14 000 gallon tank cars and 28 000 gallon tank cars Simplify your answers Type whole numbers