Answer:15. c = 0.27 + 0.11 m(a) for m = 10c = 0.27 + 1.1 = 1.37(b) for m = 5c = 0.27 + 0.55 = 0.82(c) diff in m=10 and m=60for m=60 ; c= 0.27 + 6.6 = 6.87diff = 6.87 - 1.37 = 5.5(16) p = 6c - 300(a) for c=0 means no sales and zero profit for c=15 means profit p = 90 - 300 = -210the meaning is the profit can only be seen when sales c is greater then 50(b) for c= 50 ; p=0 for c=62 ; p=72this means profit of 72 was recorded (c) for c = 75 ; p=150 for c = 100 ; p=300less profit of 150 would be recorded if the sale of 75 was made instead of 100Step-by-step explanation:15. c = 0.27 + 0.11 m(a) for m = 10c = 0.27 + 1.1 = 1.37(b) for m = 5c = 0.27 + 0.55 = 0.82(c) diff in m=10 and m=60for m=60 ; c= 0.27 + 6.6 = 6.87diff = 6.87 - 1.37 = 5.5(16) p = 6c - 300(a) for c=0 means no sales and zero profit for c=15 means profit p = 90 - 300 = -210the meaning is the profit can only be seen when sales c is greater then 50(b) for c= 50 ; p=0 for c=62 ; p=72this means profit of 72 was recorded (c) for c = 75 ; p=150 for c = 100 ; p=300less profit of 150 would be recorded if the sale of 75 was made instead of 100