Answer:
Explanation:
I hope you understand this
So first, you add all the numbers together
8.40*3=25.20
12.89*2=25.78
18.90*1=18.90
____________
$69.88
Divide the number of shirts: 6 by the total amount
69.88
_____ = $11.64666= $11.65 is your answer!
6
Choose the one on the very top.
The sum of the first n natural numbers and 0=
n*(n+1)/2