Kapil, Mohan, and Raju can do a piece of work separately in 18, 36, and 54 days. They started the work together but Mohan left the work 8 days before the completion of work and Raju left the work 6 days before the completion of the work. Find the (approximate) time in which the work is completed.

A

19 days

B

13 days

C

15 days

D

12 days