3 A large company in the communication and publishing indust
Solution
1) P = 150 - 0.01 D where D = demand for an annual printing of this particular product.
Fixed cost (TFC)= $ 50,000
Average varibale cost = $40
Total variable cost (TVC) = (40)(D) = 40 D
So, the total revenue (TR) = P (D)
= 150 - 0.01 D (D)
= 150D - 0.01 D2
Total cost (TC) = TFC + TVC
= $ 50,000 + 40 D
Profit = TR -TC
= (150 D - 0.01 D2) - (50000 + 40 D)
Now, do the first derivative of total profit and equate it with zero.
= 150 - 0.01(2) D - 40
= 110 - 0.02 D = 0
D = 110/0.02
D = 5500 [ Optimal demand]
2.) Maximum profit that can be achieved ,is by putting D =5500 in total profit function:
Total profit = [150 (5500) - 0.01(5500)2 ] - [50,000 + 40 (5500) ]
= [825000 - 0.01(30250000)] - [ 50,000 + 220000]
= [825000 - 302500] - [270000]
= 522500 - 270000
= $ 252500 [ Maximum profit that can be achieved]

