Answer:
Part (a):
Make a table showing the value of the marginal product for each screen from the first through the fifth:
Solution:
The answer is attached.
Part (b):
How many screens will be built if the real interest rate is 5.5 percent?
Answer: 3 screens
Part (c):
How many screens will be built if the real interest rate is 7.5 percent?
Answer: 1 screen
Part (d):
How many screens will be built if the real interest rate is 10 percent?
Answer: 0 screens
Part (e):
If the real interest rate is 5.5 percent, how far would construction costs have to fall before the builder would be willing to build a five-screen complex?
Answer: $727,272.73(approx.)
Step-by-step explanation:
Part (a):
Make a table showing the value of the marginal product for each screen from the first through the fifth:
Solution:
The solution is attached with working.
Part (b):
How many screens will be built if the real interest rate is 5.5 percent?
Solution:
3 screens
The interest cost of each screen = 5.5% x $1,000,000 = $55,000.
There are no other costs mentioned. The value of marginal product exceeds $55,000 for 3 screens.
Therefore, 3 screens should be built.
Part (c):
How many screens will be built if the real interest rate is 7.5 percent?
Solution:
1 screen
The value of the marginal product exceeds the interest cost (7.5% of $1,000,000, or $75,000) for only the first screen.
Thus, one screen will be built.
Part (d):
How many screens will be built if the real interest rate is 10 percent?
Solution:
0 screens
At 10% interest, the interest cost of a screen is $100,000, more than the value of the marginal product of even the first screen.
Thus, no screens will be built.
Part (e):
If the real interest rate is 5.5 percent, how far would construction costs have to fall before the builder would be willing to build a five-screen complex?
Solution:
The value of the marginal product of the fifth screen is $40,000. At an interest rate of 5.5%, building five screens is profitable only if 5.5% times the per-screen construction cost is no greater than $40,000.
Financial cost per screen = real interest rate x construction cost of per screen
$40, 000 = 5.5% x construction cost per screen Construction cost per screen = $40,000 ÷ 5.5%
= $727,272.73(approx.)