Previous earnings 15 month period calculation question

Hi,

My ILR PEO Application date(Tier 1 General) is on 22 April 2014.

Does my salary received on 31 January 2013 qualify for inclusion in previous earnings?

Specifically I will be adding only one row in the earnings start and end date table (Question A4 in SET(O)) :

Start: 31 01 2013 End: 31 07 2013

or

Start: 01 01 2013 End: 31 07 2013 is better? But does it not fall outside of 15 calendar month period from 22 April 2014?

Edit -

Now, I think probably it should be:
Start: 23 01 2013 End: 22 08 2013 if I count back 15 cal months from 22 April 2014!

Section a mentions as follow
Earnings period we will assess
An applicant can claim points for the earnings he/she has previously made for
his/her work.
The applicant can claim points for previous earnings in any single, consecutive
12-month period during the 15 months immediately before the date of applying.

Salary / wages received for the work done on 23 Jan 2013 and onward should be included. This does not mater when did u got the said amounts.Its the period of work that counts.
Hope it will help

Thanks afzalfinance