The Most Wonderful Time of the Year

I got a call last night from my neice in Arizona.

Hi! It's Makayla.
Hello Makayla! What do I owe for the pleasure of this call? (she is only 7, she had no clue what I said).
Um, I'm selling Girl Scout Cookies.
Wow! Great! (Stomach rumbles) What kind of cookies to you have?
We have Do-Si-Dos, Tagalongs, All Abouts, Samoas, Trefoils, ... (all said with perfect diction and without hesitation).
Well (scratching head, thinking how on earth would they get to me in NY from AZ), is sissy selling them too (her older sister is also in Brownies)
Yes...
What is your favorite?
Thin Mints! They taste best when you put them in the freezer.
What is Gwen's favorite?
(Makayla yells at her sister) GWEN! What is your favorite cookie???
Samoas. Wait! No! Double Dutch Chocolate.
Ok. How about I buy 1 box of your favorite from you and one box from Gwen of her favorite. And better yet, how about, I let you guys keep the box.
(Makayla screams to her mom in utter excitement) MOM! Aunt M is gonna buy 2 boxes of cookies from us and LET US KEEP THEM!
(Gwen is all excited in background).
Thank you!
How much are they?
They are $3 a box.
(thinking WOW box prices sure went up from when I was a kid) Ok, kiddo. When do I need to send you the check?
By February 25.
Ok. You are a great sales lady.
Thank you! (again, with perfect diction and pitch)

Then I remember, E is in Girl Scouts and will be selling soon and so will K's kids. It's the most wonderful time of the year! How many boxes of Tagalongs should I get??