Question : Which of the following cost is related to marginal cost ?

Option 1: Variable cost .

Option 2: Implicit cost 

Option 3: Prime cost .

Option 4: Fixed cost .

Question : The ratio of the cost price and selling price of an article is 10 : 11. The gain percentage is:

Option 1: 10%

Option 2: 8%

Option 3: 5%

Option 4: 15%

Question : A dealer marks an article 60% above the cost price and sells it to a customer allowing two successive discounts of 10% and 20% on the marked price. If he gains INR 1,064 in the transaction, the cost price (in INR) of the article is:

Option 1: 8400

Option 2: 7000

Option 3: 6300

Option 4: 7200

Question : A shopkeeper sold an item at 10% loss after giving a discount equal to half the marked price. Then the cost price is:

Option 1: $\frac{1}{9}$th of the marked price

Option 2: $\frac{4}{9}$th of the marked price

Option 3: $\frac{5}{9}$th of the marked price

Option 4: $\frac{7}{9}$th of the marked price

Question : The marked price of an article is 40% above its cost price. If its selling price is $73 \frac{1}{2} \%$ of the marked price, then the percentage profit is:

Option 1: 2.9%

Option 2: 2.7%

Option 3: 2.6%

Option 4: 2.5%