Thanks for your reply.
I am getting 0.09M in the avg reference line by the above expression.
I think I need to get 5.04 as average.
I have calculated like below in manual process
sum of all the months/12=4.87+5.66+4.73+4.96+4.15+5.94+6.24+5.71+6.07+6.38+ 5.88/12
Please let me know is this correct process to validate the results.