I was thinking about  the song The Twelve Days of Christmas and wondered how many of each gift actually arrives by the twelfth day. To help you  with the lyrics of the song,

              1st day - one partridge in a pear tree
              2nd day - two turtles doves
             3rd  day - three french hens
             4th day - four calling birds
             5th day - five golden rings
             6th day - six geese a laying
             7th day - seven swans a swimming
             8th day - eight maids a milking
             9th day - nine ladies dancing
            10th day - ten lords a leaping
            11th day - eleven pipers piping
           12th day - twelve drummers drumming

In the song, on the first day one partidge arrives,
                      on the second day two turtle doves and one partridge arrive,
                      on the third day three french hens, two turtle doves, and one partidge arrive.

So that means by the third day I have 3 partidges, 4 turtle doves, and 3 french hens.  My question is by the twelfth day, how many of each gift has arrived?  Show your work.