URGENT! How do you calculate for marginal cost against fixed cost. E.g., a company produces 2 pairs of shoes at $390.00. If it produces 1 more pair (making total production 3), total cost is $600.00. If no production is made, the fixed cost is $130. With this scenario, how do you compute for the marginal cost if it produces no shoes at the fixed rate indicated.

Question

URGENT!  How do you calculate for marginal cost against fixed cost.  E.g., a company produces 2 pairs of shoes at $390.00.  If it produces 1 more pair (making total production 3), total cost is $600.00. If no production is made, the fixed cost is $130.  With this scenario, how do you compute for the marginal cost if it produces no shoes at the fixed rate indicated.