Solving the example with clear steps and clear desicion variables

--- Question 5 - Silicon Valley Corporation (Silvco) manufactures transistors. An important aspect of the manufacture of transistors is the melting of the element germanium (a major component of a transistor) in a furnace. Unfortunately, the melting process yields germanium of highly variable quality. Two methods can be used to melt germanium; method 1 costs $50 per transistor, and method 2 costs $70 per transistor. The qualities of germanium obtained by methods 1 and 2 are shown in Table 5. Silvo can refire melted germanium in an attempt to improve its quality. It costs $25 to refire the melted germanium for one transistor. The results of the refiring process are shown in Table 6. Silvco has sufficient furnace capacity to melt or refire germanium for at most 20,000 transistors per month Silveo's monthly demands are for 1,000 grade 4 transistors, 2,000 grade 3 transistors, 3,000 grade 2 transistors, and 3,000 grade 1 transistors. Use linear programming to minimize the cost of producing the needed transistors. Percent Yielded by melting Grade of Melted Germanium Method 1 Method 2 Defective 30 20 1 30 20 2 20 25 3 15 20 4 S 15 Tobles. The cost per pound of each chemical and the amount of each octive ingredient in 1 lbs of each chemical Percent Yielded by Refiring Refined Grade of Germanium Defective Grade 1 Grade 2 Grade 3 Defective 25 30 30 0 0 0 1 0 0 2 15 30 40 0 3 20 20 30 SO 4 10 20 30 50 Yoble 6. The cost per pound of each chemical and the amount of each active ingredient in 1 lb of each chemical