As an exercise, obtain the optimum loading of the two generating units in Problem 3.1 using the following technique. The two units are to deliver 100 MW. Assume both units are on-line and delivering power. Plot the total fuel cost for 100 MW of delivered power as generation is shifted from one unit to the other. Find the minimum cost. The optimum schedule should check with the schedule obtained by equal incremental production costs. Problem 3.1 Assume that the fuel inputs in MBtu per hour for units 1 and 2, which are both on-line, are given by