a. 160 b.180 c.200 d.240 2)What is the total cost of 2 units? a.200 b.180 c.240 d.300 3)What is the Marginal Cost (MC) of the 2nd unit? a.8 b.6 c.12 d.10 4)What is the total variable cost of 4 units? a.32 b.28 c.36 d.44 5)What is the Marginal Cost (MC) of the 6th unit? a.12 b.15 c.16 d.18 Use the chart below to answer questions 15.