During the year ended 31st December 2001,

Nuju Enterprises paid rent as follows:

Jan. 20, N24 000 for a period of 4 months.

May. 16, N30 000 for a period of 5 months.

Oct. 15, N36 000 for a period of 6 months.

What is the overpaid portion of the rent?

• A N36 000
• B N18 000
• C N12 000
• D N6 000