ion, it may round up or down to an integer.
While that alone may not be too much of a problem if you are not going to do arithmetic operations on that potentially inexact number, it is a problem that can be off by up to 2 units if you do perform arithmetic operations afterwards. So instead
of offsetting from the fill amounts, we are offsetting from the quantity amounts, done by doing this instead:
<ol>
	<li>Take <kbd>FirstQuantity</kbd> and <kbd>MaxQuantity</kbd>, and use <kbd>CalculateGraphicalBarPercentag