You should be able to find it by using the (length x width x height) formula. That’s the formula for volume. Since it’s a cube all the sides should equal the same length width and height. I’m sorry if I’m wrong but I tried! Have a great night!
$3.49 X .10 = .35
the discount is .35 or 35 cents
final cost
3.49-.35= $3.14
hope this helps