Each face of cabinet 413s is in the shape of a rectangle. what is the volume of model 413s in cubic feet

Hopefully this is the question you are talking about!
They want us to find the volume of model 413S in ft³
This isnt tough!
change the side measurements from Inches to Feet
12 in = 1 ft

so therefore:
24 in = 2 ft
72 in = 6 ft
18 in = 1.5 ft

Volume of a cuboid is:
Area of base × height of cuboid
V = 2 ft × 6 ft ×1.5 ft
   = 18 ft³
Volume of the cabinet (Model 413S) is 18 ft³