calculate pay checks per month, to get monthly income value for that month.

i get paid every 14 days so sometimes i get paid three times in a month. I would like to be able to figure out which months this occurs on, possible even auto load it if its in that month into monthly income. So far i input first pay day of the year then did a simple +14 but feel free to educate me if there is a smarter option.

note: if i ignorantly continued with what i have i was going to try to count the number of times a month occurred then get current month check it and multiply pay.... ahhh i know its alot.

I am new here and it seemed like there was some solid advice so please excuse any noobish errors.

i noticed it was common to give attachment as example mine is in office 2010

Thanks!