Rainbow Dash is thinking, why must she wait so long if all she wants to buy its a jar of turtle shell polisher  
Pinkie Pie its at the end of the line and it’s perfectly ok with that, she is so ok with that, that she let Fluttershy cut in front of her  
Fluttershy its breaking the No pets allowed rule like she always does  
Rarity being the productive lady she is, is using her time at the line to do a little embellishment  
Applejack is trying to find if there is some kind of frequent customer discount card or something  
And Twilight, like every single cashier ever, is rethinking her life decisions