Step-by-step explanation:

Answer:
325 pencils, 650 markers, 975 pens
Step-by-step explanation:
in picture.
Sqrt(8^2 + 3^2)
Y is 3,4
Z is -5,1
3-(-5) = 8 (difference between x coords)
4-1 = 3 (difference between y coords)
Equation is: sqrt( (xdiff)^2 + (ydiff)^2 )