Suppose that the marginal cost of mining gold is constant at $300 per ounce and the demand schedule is as follows: PRICE (per oz.) QUANTITY (per oz.)
$1000 1000
$900 2000
$800 3000
$700 4000
$600 5000
$500 6000
$400 7000
$300 8000
A) If the number of supplies is large, what would be the price and quantity?
B) If there is only one supplier, what would be the price and quantity?
C) If there are only two suppliers and they form a cartel, what would be the price and quantity?
D) Suppose that one of the two cartel memebers in part (c) decides to increase its production by 1,000 ounces while the other member keeps its production constant. What will happen to the revenues of both firms?

a) The price would be $300 and quantity would be 8000 oz

b) The price would be $700 and quantity would be 4000 oz

c) The price would be $700 and quantity would be 2000 oz each

d) The revenues of both firm would : increase ( for the firm that increase production ) and decrease ( for the firm that doesn't increase production)

Explanation:

marginal cost = $300

calculate the value of TR ( total revenue for each price and quantity given )

TR = price * quantity

also calculate the MR ( marginal revenue  for each )

MR =

For the first value : TR = $1000000 , MR = nil

For the second value : TR = $1800000 , MR = $800

For the third value : TR = $2400000. MR = $600

For the fourth value : TR = $2800000 , MR = $400

For the fifth value:  TR = $3000000 , MR = $200

For the sixth value : TR = $3000000, MR = $0

For the seventh value : TR = $2800000, MR = -$200

For the eighth value : TR = $2400000, MR = -$400

a)The price would be $300 and quantity would be 8000 oz because from the table above that is the point with highest  quantity supplied

b) The price would be $700 and quantity would be 4000 oz because the single supplier would put the price and quantity to be supplied at the point where marginal cost is closest to the marginal revenue

d) The revenues of both firm would : increase ( for the firm that increase production ) and decrease ( for the firm that doesn't increase production) this is because increase in production is directly proportional to increase in revenue .